UitbreidenOS Tax Organizer
When to activate
- End of a quarter — estimated tax payment is due and you need your numbers together
- Your accountant is asking for documents and you are not sure what to gather
- You are preparing for a tax review meeting and want to walk in organized
- You bought significant equipment, started working from home, or changed how you use your vehicle — and you want to make sure you are capturing the right deductions
When NOT to use
- You need tax advice — Claude organizes your numbers and documents, it does not give tax advice or calculate your tax liability
- The quarter just started and you have less than 3 months of transactions to review — wait until you have a full quarter
- You have a complex situation with multiple entities, partners, or international income — work directly with a CPA from the start
Instructions
Step 1: Tell Claude your situation once
Start every tax quarter by giving Claude your business profile. You do this once and update it when something changes:
"I'm a sole proprietor (Schedule C), based in Texas, no state income tax. I run a consulting business. Revenue is roughly $180,000 per year. I use my car about 40% for business, I have a home office that is 200 square feet out of 1,500 total, and I bought a $2,800 laptop in March. My main expense categories are subcontractors, software, travel, and professional development."
Claude confirms your deduction categories and tells you exactly what documentation you need for each one. You save this list and use it every quarter.
Step 2: Generate your personal receipt checklist
Ask Claude:
"Based on my situation, give me a checklist of every document I need to gather for this quarter's taxes."
Claude produces a checklist matched to your specific situation — not a generic list. For the example above, it would include:
- Mileage log for business travel (date, destination, purpose, miles)
- Home office: no action needed if square footage is stable — just confirm nothing changed
- Laptop: locate the purchase receipt from March — needed for Section 179 deduction
- Subcontractor payments over $600: confirm W-9s are on file for each
- Software subscriptions: pull statements for any that were not expensed in QuickBooks
- Professional development: receipts for courses, books, conferences
Step 3: Categorize your transactions
Export your transaction list from QuickBooks or your bank and paste it into Claude. Ask:
"Categorize each of these transactions into IRS-recognized expense categories. Flag anything that might be deductible that I have not categorized yet."
Claude organizes transactions into categories: Advertising, Contractor Fees, Education, Equipment, Meals (50% deductible), Office Supplies, Professional Services, Software, Travel, Utilities, Vehicle.
It also flags items you may have missed — for example, bank fees, PayPal processing fees, LinkedIn Premium, annual software renewals paid in a lump sum.
Step 4: Summarize each major deduction category
For each category with significant spend, ask Claude to draft a one-paragraph summary:
"Write a summary of my vehicle deduction for this quarter."
Claude produces: "Vehicle use: 3,200 business miles driven this quarter based on your log. At the 2025 standard mileage rate of $0.70/mile, that is a $2,240 deduction. Alternatively, if you have tracked actual expenses (gas, insurance, maintenance), you can calculate the 40% business-use portion. Standard mileage is simpler and likely higher for you — confirm with your CPA which method to use for the full year."
These summaries go directly into your CPA handoff document.
Step 5: Build the CPA handoff packet
Ask Claude:
"Pull together a one-page quarterly tax summary I can send to my CPA. Include all numbers, categories, questions I have, and a list of receipts I still need to locate."
Claude produces a structured document:
- Business summary (entity type, quarter, revenue total)
- Expense categories with dollar amounts
- Deduction notes (vehicle, home office, equipment)
- Receipts confirmed on hand
- Receipts still needed (with estimated dollar amounts)
- Questions for CPA (3-5 specific questions, not vague)
Send this to your CPA before the meeting. The meeting becomes a 30-minute review instead of a 90-minute data gathering session.
Quarterly rhythm
Run this skill in the first week after each quarter closes:
- Q1 closes March 31 — run in the first week of April
- Q2 closes June 30 — run in the first week of July
- Q3 closes September 30 — run in the first week of October
- Q4 closes December 31 — run in the first week of January
Estimated time: 45-60 minutes the first quarter, 20-30 minutes once you have a system. Compare to 8-15 hours of manual organization.
Example
You say: "I'm a sole proprietor, consulting business. Used my car 40% for business this quarter — drove about 3,100 miles total so roughly 1,240 business miles. Home office is 200 square feet out of 1,500. Bought a $2,800 laptop in March. Revenue this quarter was $44,500. Main expenses were $12,000 in subcontractors, $1,800 in software, $940 in travel, and miscellaneous office stuff around $400."
Claude produces your deduction checklist:
Vehicle (standard mileage): 1,240 miles x $0.70 = $868 deduction this quarter. Need: mileage log with date, destination, and purpose for each trip. No log yet? Claude walks you through reconstructing it from your calendar.
Home office: 200/1,500 = 13.3% of home expenses. Apply that percentage to rent or mortgage interest, utilities, and internet. Need: your monthly rent or mortgage payment, utility bills, internet bill for the quarter.
Laptop ($2,800): qualifies for Section 179 full deduction in the year of purchase. Need: purchase receipt from March. Question for CPA: take it all in Q1 or spread across the year?
Subcontractors ($12,000): confirm W-9s on file for each. Anyone paid more than $600 needs a 1099-NEC by January 31. Need: list of contractors with names, addresses, and SSNs or EINs.
Claude then drafts the CPA handoff: total quarterly revenue $44,500, total categorized expenses $15,140, estimated deductions $16,008 (including home office and vehicle). Three questions flagged for your CPA: Section 179 timing for the laptop, home office calculation method, whether a subcontractor who crossed $600 this quarter needs a W-9 now or at year end.