modbender Greek Compliance & AADE Integration
This skill transforms OpenClaw into a Greek accounting compliance specialist, handling AADE submissions, VAT calculations, payroll processing, social security contributions, and regulatory deadlines specific to Greek business operations.
Setup
# 1. Set data directory
export OPENCLAW_DATA_DIR="/data"
# 2. AADE credentials (required only for submitting filings — preparation works offline)
export AADE_USERNAME="your-aade-username"
export AADE_PASSWORD="your-aade-password"
# 3. Ensure dependencies
which jq curl || sudo apt install jq curl
# 4. Create compliance directories
mkdir -p $OPENCLAW_DATA_DIR/compliance/{vat,efka,mydata,e1,e3}
Security notes:
- AADE credentials are only used when submitting filings to the government portal
- All submissions require human approval (four-eyes workflow: preparer ≠ approver)
- Filing preparation, VAT calculation, and report generation work fully offline
- Credentials are never stored on disk — always use environment variables
Core Philosophy
- Greek Law First: All calculations and processes comply with current Greek tax and labor law
- AADE Ready: All data formatted for direct TAXIS platform submission
- Audit Compliant: Complete paper trail meeting Greek audit requirements
- Real-time Compliance: Continuous monitoring of regulatory changes and deadlines
- Payroll Precision: Accurate social security and tax calculations for Greek employees
Key Capabilities
1. AADE & TAXIS Integration
- VAT Return Preparation: Automated VAT calculation and TAXIS XML generation
- E-Books Compliance: Digital accounting records per Greek Law 4308/2014
- Invoice Registration: Real-time myDATA platform integration for invoice submission
- Tax Declaration Prep: Income tax return data compilation and formatting
- Audit File Generation: SAF-T (Standard Audit File for Tax) creation for AADE audits
- Digital Signatures: Integration with Greek qualified electronic signature providers
2. Greek VAT & Tax Management
- VAT Rate Application: Automatic application of current Greek VAT rates (24%, 13%, 6%, 0%)
- Reverse Charge Handling: EU and non-EU reverse charge VAT calculations
- VAT Refund Tracking: Monitor VAT refund applications and status with AADE
- Withholding Tax: Automatic calculation for freelancers, dividends, rent, and professional services
- Stamp Duty Calculator: Legal stamp duty (π¡αρπžςσημο) for contracts and documents
- Real Estate Transfer Tax: Property transaction tax calculations
3. Payroll & Social Security (EFKA/IKA)
- Employee Hour Tracking: Record working hours for hourly and project-based employees
- Salary Calculations: Gross to net salary with all Greek deductions
- Social Security Contributions: EFKA, IKA, unemployment, and health insurance calculations
- Overtime Calculations: Greek labor law compliant overtime rates and limits
- Holiday Pay: Vacation, sick leave, and public holiday entitlements
- 13th & 14th Salary: Automatic calculation of mandatory bonus payments
- Severance Pay: Legal severance calculations per Greek labor law
- Payroll Tax Withholding: Individual income tax withholding and annual reconciliation
4. Municipal & Local Tax Management
- Property Tax (ENFIA): Annual property tax calculations and payment tracking
- Municipal Fees: Waste collection, lighting, and other local authority charges
- Business License Renewal: Track and alert for business license renewals
- Fire Department Fees: Annual fire safety certificate renewals
- Chamber of Commerce: Professional chamber membership and fee tracking
5. Greek Banking & Payment Integration
- Greek Bank Connectivity: Integration with Alpha Bank, National Bank, Eurobank, Piraeus
- SEPA Payment Processing: EU standard payment initiation and tracking
- Greek IBAN Validation: Verify Greek bank account numbers and routing
- Bank Reconciliation: Match Greek banking formats with accounting records
- Currency Handling: EUR primary with foreign currency conversion tracking
Implementation Guidelines
AADE/TAXIS Integration Workflow
Phase 1: Data Collection & Validation
- Document Classification: Identify invoice types per Greek tax code requirements
- VAT Validation: Cross-check VAT numbers against AADE VIES database
- Business Rules Check: Ensure compliance with Greek accounting standards
- Data Completeness: Verify all mandatory fields for TAXIS submission
- Digital Signature Prep: Prepare documents for qualified electronic signature
Phase 2: TAXIS XML Generation
- Schema Validation: Use current AADE XML schemas for accuracy
- Field Mapping: Map accounting data to TAXIS required fields
- Calculation Verification: Double-check all tax calculations
- Batch Processing: Group transactions for efficient TAXIS submission
- Error Handling: Flag validation errors before submission attempt
Phase 3: AADE Submission & Monitoring
- API Connection: Secure connection to TAXIS web services
- Real-time Submission: Submit validated XML files to AADE
- Receipt Confirmation: Capture and store AADE confirmation receipts
- Error Resolution: Handle AADE rejection messages and corrections
- Status Tracking: Monitor submission status and payment confirmations
Payroll Processing Workflow
Employee Hour Tracking System
Hour Categories:
regular_hours:
- max_per_day: 8
- max_per_week: 40
- rate_multiplier: 1.0
overtime_hours:
- daily_overtime: "Hours 9-10 per day"
- weekly_overtime: "Hours 41-45 per week"
- rate_multiplier: 1.25
exceptional_overtime:
- daily_exceptional: "Hours 11+ per day"
- weekly_exceptional: "Hours 46+ per week"
- rate_multiplier: 1.5
holiday_work:
- public_holidays: "Greek national holidays"
- rate_multiplier: 2.0
night_shift:
- hours: "22:00-06:00"
- additional_rate: 0.25
Greek Social Security Calculations
Employee Contributions:
efka_main:
- rate: 6.67%
- cap: "Monthly maximum ‚¬6,500"
- description: "Main pension contribution"
efka_auxiliary:
- rate: 3.0%
- cap: "Monthly maximum ‚¬6,500"
- description: "Auxiliary pension"
unemployment_insurance:
- employee_rate: 0.87%
- employer_rate: 2.26%
- description: "OAED unemployment insurance"
health_insurance:
- employee_rate: 2.95%
- employer_rate: 4.3%
- description: "EOPYY health insurance"
Employer Contributions:
efka_employer:
- rate: 22.29%
- description: "Main employer EFKA contribution"
work_accidents:
- rate: 1.0%
- description: "Work accident insurance"
family_benefits:
- rate: 1.0%
- description: "Family allowance fund"
Tax Withholding Calculations
Income Tax Brackets (2026):
bracket_1:
- range: "‚¬0 - ‚¬10,000"
- rate: 9%
bracket_2:
- range: "‚¬10,001 - ‚¬20,000"
- rate: 22%
bracket_3:
- range: "‚¬20,001 - ‚¬30,000"
- rate: 28%
bracket_4:
- range: "‚¬30,001 - ‚¬40,000"
- rate: 36%
bracket_5:
- range: "‚¬40,001+"
- rate: 44%
Tax Credits:
basic_credit: ‚¬2,100
family_credit: "‚¬777 per child"
disability_credit: "Per disability level"
low_income_credit: "Income dependent"
Greek VAT Specifications
VAT Rates & Applications
Standard_Rate_24%:
applies_to:
- "General goods and services"
- "Professional services"
- "Construction services"
- "Telecommunications"
- "Financial services"
Reduced_Rate_13%:
applies_to:
- "Food and beverages"
- "Restaurants and catering"
- "Hotels and accommodation"
- "Medical services"
- "Educational services"
Super_Reduced_Rate_6%:
applies_to:
- "Books and newspapers"
- "Pharmaceutical products"
- "Cultural events"
- "Public transport"
Zero_Rate_0%:
applies_to:
- "Exports outside EU"
- "International transport"
- "Diplomatic exemptions"
- "Some medical equipment"
Island_Rates:
description: "Reduced rates for Greek islands"
standard_island: 17%
reduced_island: 9%
super_reduced_island: 4%
applies_to:
- "Aegean islands (except Skyros)"
- "Ionian islands (except Corfu and Zakynthos)"
myDATA Invoice Integration
Required_Invoice_Fields:
issuer_info:
- vat_number: "Greek VAT registration number"
- tax_office: "Tax office code"
- business_name: "Legal business name"
- address: "Complete registered address"
customer_info:
- vat_number: "Customer VAT (if business)"
- name: "Customer name/business name"
- address: "Customer address"
- country: "ISO country code"
invoice_details:
- series: "Invoice series designation"
- number: "Sequential invoice number"
- issue_date: "ISO date format"
- invoice_type: "Sales, Services, Credit Note, etc."
line_items:
- description: "Service/product description"
- quantity: "Decimal quantity"
- unit_price: "Price per unit"
- vat_rate: "Applicable VAT percentage"
- vat_amount: "Calculated VAT"
- total_amount: "Line total including VAT"
payment_methods:
- method_code: "AADE payment method code"
- amount: "Amount paid by this method"
- payment_date: "When payment received"
Regulatory Deadline Management
Monthly Deadlines
VAT_Return:
due_date: "20th of following month"
late_penalty: "5% of tax due + interest"
Payroll_Submissions:
efka_contributions: "15th of following month"
withholding_tax: "20th of following month"
Invoice_Submission:
mydata_upload: "Real-time (within 24 hours)"
batch_processing: "Daily at midnight"
Quarterly Deadlines
Quarterly_VAT:
q1_deadline: "April 25"
q2_deadline: "July 25"
q3_deadline: "October 25"
q4_deadline: "January 25 (following year)"
Social_Security_Reports:
efka_quarterly: "Last day of month following quarter"
accident_reports: "January 31, April 30, July 31, October 31"
Annual Deadlines
Income_Tax_Returns:
individuals: "June 30"
businesses: "May 31"
extensions_available: "Until August 31 with penalty"
Property_Tax_ENFIA:
declaration_due: "April 30"
payment_installments:
- first: "End of July"
- second: "End of September"
- third: "End of November"
- fourth: "End of January (following year)"
Annual_Financial_Statements:
small_companies: "July 31"
medium_large_companies: "June 30"
audit_required: "Companies over ‚¬4M revenue"
Workflow Templates
Daily Greek Accounting Routine
Morning Startup (8:00 AM Greece Time)
1. **AADE Status Check**: Verify TAXIS connectivity and any system announcements
2. **myDATA Sync**: Process overnight invoice submissions and confirmations
3. **VAT Rate Updates**: Check for any VAT rate changes or announcements
4. **Deadline Alerts**: Review upcoming compliance deadlines (next 7 days)
5. **Payroll Hour Collection**: Gather employee hour submissions from previous day
6. **Bank Reconciliation**: Download overnight bank transactions from Greek banks
Continuous Processing
1. **Invoice Processing**: Real-time myDATA submission for new invoices
2. **Hour Tracking**: Record employee hours as they're submitted
3. **Expense Categorization**: Apply correct VAT rates and deductibility rules
4. **Social Security Monitoring**: Track contribution calculations and payments
5. **Municipal Fee Tracking**: Monitor local authority payment due dates
End of Day (18:00 Greece Time)
1. **Daily VAT Summary**: Calculate daily VAT position and running totals
2. **Payroll Validation**: Verify all employee hours recorded accurately
3. **AADE Submission Confirmation**: Ensure all invoices successfully submitted
4. **Tomorrow's Alerts**: Preview upcoming deadlines and required actions
5. **Backup Verification**: Confirm all processed data backed up securely
Monthly Processing Workflow
Pre-Month End (Days 25-30)
1. **VAT Return Preparation**: Compile VAT transactions for monthly return
2. **Payroll Calculations**: Process monthly salaries with all deductions
3. **EFKA Contribution Prep**: Calculate and prepare social security payments
4. **Client Invoice Generation**: Create and submit client invoices via myDATA
5. **Expense Validation**: Final review of monthly business expenses
Month End Processing (Day 1-5 of following month)
1. **VAT Return Submission**: Submit monthly VAT return to AADE via TAXIS
2. **Payroll Distribution**: Generate payslips and process salary payments
3. **Social Security Filing**: Submit EFKA contributions and employee declarations
4. **Municipal Tax Review**: Check for any municipal fee payments due
5. **Financial Statement Prep**: Monthly P&L and balance sheet generation
Payroll Processing Examples
Employee Hour Tracking Interface
Employee: "Nikos Papadopoulos"
Pay_Period: "February 2026"
Employee_Type: "Full-time hourly"
Weekly_Schedule:
monday: "08:00-16:00 (8 hours)"
tuesday: "08:00-16:00 (8 hours)"
wednesday: "08:00-16:00 (8 hours)"
thursday: "08:00-16:00 (8 hours)"
friday: "08:00-16:00 (8 hours)"
saturday: "Overtime: 08:00-12:00 (4 hours)"
sunday: "Rest day"
Monthly_Calculation:
regular_hours: 160 # (4 weeks × 40 hours)
overtime_hours: 16 # (4 weeks × 4 hours Saturday)
public_holiday_hours: 8 # (Clean Monday)
total_hours: 184
Gross_Pay_Calculation:
hourly_rate: ‚¬12.00
regular_pay: ‚¬1,920.00 # (160 × ‚¬12.00)
overtime_pay: ‚¬240.00 # (16 × ‚¬12.00 × 1.25)
holiday_pay: ‚¬192.00 # (8 × ‚¬12.00 × 2.0)
gross_total: ‚¬2,352.00
Social Security & Tax Deductions
Social_Security_Deductions:
efka_main: ‚¬156.81 # (‚¬2,352 × 6.67%)
efka_auxiliary: ‚¬70.56 # (‚¬2,352 × 3.0%)
unemployment: ‚¬20.46 # (‚¬2,352 × 0.87%)
health_insurance: ‚¬69.38 # (‚¬2,352 × 2.95%)
total_ss_deductions: ‚¬317.21
Income_Tax_Calculation:
annual_projection: ‚¬28,224 # (‚¬2,352 × 12)
tax_bracket_1: ‚¬900.00 # (‚¬10,000 × 9%)
tax_bracket_2: ‚¬2,200.00 # (‚¬10,000 × 22%)
tax_bracket_3: ‚¬2,240.00 # (‚¬8,224 × 28%)
gross_annual_tax: ‚¬5,340.00
annual_tax_credit: ‚¬2,100.00
net_annual_tax: ‚¬3,240.00
monthly_withholding: ‚¬270.00
Net_Pay_Calculation:
gross_pay: ‚¬2,352.00
social_security: -‚¬317.21
income_tax: -‚¬270.00
net_pay: ‚¬1,764.79
Integration Requirements
Required OpenClaw Skills
# Core document processing
npx openclaw skills add deepread # OCR for Greek documents
npx openclaw skills add pdf-tools # PDF manipulation
# Other Greek accounting skills (install alongside this one)
npx openclaw skills add greek-banking-integration # Bank statement import for VAT reconciliation
npx openclaw skills add efka-api-integration # Social security submissions
npx openclaw skills add cli-deadline-monitor # Deadline alerts for AADE obligations
npx openclaw skills add client-data-management # Client records and filing history
Government API Connections
AADE_TAXIS:
base_url: "https://www1.aade.gr/taxisnet"
authentication: "Greek Tax ID + Password + 2FA"
rate_limits: "1000 requests/hour"
myDATA_Platform:
base_url: "https://mydata-dev.azure-api.net" # Test environment
production_url: "https://mydatapi.aade.gr"
authentication: "Username/password + optional digital certificate"
real_time_required: "Invoice submission within 24 hours"
EFKA_Portal:
base_url: "https://www.efka.gov.gr"
submission_method: "File upload + digital signature"
deadlines: "15th of following month"
Greek_Banks_API:
alpha_bank: "Open Banking PSD2 API"
nbg: "Developer Portal API"
eurobank: "Business API Gateway"
piraeus: "WinBank Business API"
Security & Compliance Features
Data Protection (GDPR Greece)
- Personal Data Encryption: All employee and client data encrypted at rest
- Access Logging: Complete audit trail of all data access
- Data Minimization: Only collect necessary data for compliance
- Right to Erasure: Automated employee data deletion processes
- Consent Management: Track and manage employee consent for data processing
Greek Audit Requirements
- Digital Signatures: Integration with Greek qualified signature providers
- Immutable Records: Blockchain-based record integrity for critical transactions
- SAF-T Generation: Standard Audit File for Tax authorities on demand
- Document Retention: 5-year retention policy per Greek tax law
- Change Tracking: Complete modification history for all financial records
Four-Eyes Approval Workflow for Government Submissions
All filings to AADE, EFKA, and myDATA require two-person approval before submission. This protects against accidental filings and provides professional liability coverage.
Four_Eyes_Workflow:
step_1_prepare:
role: "accountant"
action: "Prepare the filing (VAT return, EFKA declaration, myDATA submission)"
command: "openclaw greek vat-return --client EL123456789 --period 2026-01 --prepare"
output: "Draft filing saved to /data/processing/compliance/ with status: prepared"
step_2_review:
role: "senior_accountant"
action: "Review the prepared filing — verify figures, check for anomalies"
command: "openclaw greek review-filing --afm EL123456789 --period 2026-01 --type vat"
output: "Filing displayed with summary, comparison to prior period, and anomaly flags"
step_3_approve:
role: "senior_accountant"
action: "Explicitly approve the filing for submission"
command: "openclaw greek approve-filing --afm EL123456789 --period 2026-01 --type vat --approved-by m.papadopoulou"
output: "Filing status changed to: approved. Approval logged to audit trail."
step_4_submit:
role: "senior_accountant"
action: "Submit the approved filing to the government system"
command: "openclaw greek submit-filing --afm EL123456789 --period 2026-01 --type vat"
gate: "System verifies filing has approval record before allowing submission"
output: "Filing submitted. Confirmation receipt stored. Status: submitted."
enforcement:
- "A filing with status 'prepared' cannot be submitted — it must be 'approved' first"
- "The preparer and approver must be different users"
- "Both preparer and approver are recorded in the audit event"
- "Emergency override requires admin role and logs a security event"
audit_record:
prepared_by: "username of accountant who prepared the filing"
prepared_at: "timestamp of preparation"
approved_by: "username of senior_accountant who approved"
approved_at: "timestamp of approval"
submitted_by: "username of person who triggered submission"
submitted_at: "timestamp of submission"
submission_ref: "AADE/EFKA confirmation reference"
This workflow applies to:
- VAT returns (F2) to AADE/TAXIS
- EFKA social security declarations (ΑΠΔ)
- myDATA invoice submissions (batch)
- E1 individual tax returns
- Corporate tax filings
- Any amended or corrected filing
Performance Metrics
AADE Integration Success
- Submission Success Rate: >99% successful TAXIS submissions
- myDATA Real-time Compliance: 100% invoices submitted within 24 hours
- VAT Calculation Accuracy: >99.9% accuracy in VAT computations
- Deadline Compliance: Zero missed regulatory deadlines
Payroll Processing Efficiency
- Hour Processing Speed: 100 employee hours processed in <5 minutes
- Calculation Accuracy: >99.9% accuracy in payroll calculations
- Social Security Compliance: 100% accurate EFKA contribution calculations
- Payslip Generation: Automated payslips ready within 2 hours of hour submission
Usage Examples
Example 1: Monthly VAT Processing
Command: openclaw compliance vat-return --client EL987654321 --period 2026-02 --prepare
System Response:
1. Loads all February invoices and receipts from /data/clients/EL987654321/documents/
2. Applies correct VAT rates (24%, 13%, 6%) based on transaction type and KAD
3. Calculates VAT position: EUR15,250 collected, EUR3,480 paid = EUR11,770 net due
4. Generates TAXIS XML at /data/compliance/vat/EL987654321_202602_vat_return.xml
5. Validates XML against current AADE schema before submission
Output: "February VAT return prepared. Net VAT due: EUR11,770. Payment due: March 20, 2026."
Next step: openclaw compliance vat-return --client EL987654321 --period 2026-02 --submit
Example 2: Employee Payroll Processing
Command: openclaw compliance payroll --client EL987654321 --employee "Maria Konstantinou" --period 2026-02 --hours-file /data/incoming/hours/maria_feb2026.csv
System Response:
1. Loads hours data: 168 regular + 8 Sunday overtime + 8 public holiday (Clean Monday)
2. Calculates gross pay: EUR15/hr x 168 + EUR18.75/hr x 8 + EUR30/hr x 8 = EUR2,910.00
3. Applies EFKA deductions: EUR431.58 (employee portion across all categories)
4. Calculates income tax withholding: EUR402.30
5. Writes payslip to /data/clients/EL987654321/payroll/2026-02/maria_konstantinou_payslip.pdf
6. Prepares EFKA declaration file for submission
Output: "Payslip generated. Net pay: EUR2,076.12. EFKA declaration ready for submission."
Next step: openclaw efka submit-declaration --client EL987654321 --period 2026-02
Example 3: Real-time Invoice Submission to myDATA
Command: openclaw compliance mydata-submit --client EL987654321 --invoice /data/ocr/output/accounting-ready/inv_2026_456.pdf
System Response:
1. Extracts required myDATA fields from invoice (vendor, customer, amounts, VAT, dates)
2. Identifies EU client -- applies reverse charge VAT (0% output, note added)
3. Generates myDATA XML with required structure
4. Submits to AADE myDATA API at mydatapi.aade.gr
5. Receives and stores confirmation receipt
6. Logs submission to /data/clients/EL987654321/compliance/filings.json
Output: "Invoice #2026-456 submitted to myDATA. Confirmation: AAD-2026-ABC123456789."
Troubleshooting & Error Handling
Common AADE Integration Issues
Connection_Errors:
symptoms: "TAXIS login failures"
solutions:
- "Check internet connectivity"
- "Verify tax credentials"
- "Check 2FA token validity"
- "Retry with exponential backoff"
Validation_Errors:
symptoms: "XML submission rejected"
solutions:
- "Validate against current AADE schema"
- "Check all mandatory fields"
- "Verify VAT calculations"
- "Confirm digital signature validity"
Rate_Limiting:
symptoms: "Too many requests error"
solutions:
- "Implement request queuing"
- "Batch multiple submissions"
- "Spread submissions across day"
- "Use off-peak hours for bulk operations"
Payroll Calculation Issues
Hour_Tracking_Errors:
symptoms: "Overtime calculations incorrect"
solutions:
- "Verify Greek labor law compliance"
- "Check holiday calendar updates"
- "Validate employee contract terms"
- "Review collective agreement rules"
Social_Security_Errors:
symptoms: "EFKA contribution mismatch"
solutions:
- "Update contribution rates quarterly"
- "Check salary caps and thresholds"
- "Verify employee insurance category"
- "Review disability/age adjustments"
Success Criteria
A successful Greek compliance system should achieve:
- ✅ 100% AADE deadline compliance
- ✅ 99.9% VAT calculation accuracy
- ✅ Real-time myDATA invoice submission
- ✅ Zero payroll calculation errors
- ✅ Complete audit trail for all transactions
- ✅ 80% reduction in manual compliance work
- ✅ Integration with all major Greek banks
- ✅ Automated social security submissions
Legal Disclaimers
Professional Responsibility
- This skill assists with Greek tax compliance but does not replace professional accounting advice
- Users must verify all calculations against current Greek tax law
- Regular updates required as Greek tax regulations change
- Professional liability insurance recommended for accounting firms
- Final responsibility for tax compliance remains with the business owner/accountant
Regulatory Updates
- Greek tax law changes frequently - skill requires regular updates
- AADE may change API specifications or requirements
- Social security rates and thresholds change annually
- Municipal tax rules vary by locality and change regularly
- Users must monitor official government announcements
Remember: This skill enhances accuracy and efficiency but professional oversight remains essential for Greek tax compliance.