# Form 1120 Preparation From Expense Sheet

> Map cash-basis expense sheet to Form 1120 schedules for C-Corp tax filing, including revenue reconciliation, Schedule L balance sheet reconstruction without prior returns, and gap identification.

- Skill: `vamseeachanta/form-1120-preparation-from-expense-sheet` (Agent Skill)
- Install (CLI): `npx skillmds@latest add vamseeachanta/form-1120-preparation-from-expense-sheet`
- Raw SKILL.md: https://api.skillmd.com/api/skills/vamseeachanta/form-1120-preparation-from-expense-sheet/raw
- Safety review: PASS (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Finance & Business
- Author: vamseeachanta (https://skillmd.com/u/vamseeachanta)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/vamseeachanta/form-1120-preparation-from-expense-sheet

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# Form 1120 Preparation from Expense Sheet

When a client provides an expense sheet as source-of-truth for a C-Corp cash-basis filing but lacks prior-year returns or complete bank records: (1) validate revenue/expense totals against the expense sheet, (2) map each expense line to the appropriate Form 1120 schedule (COGS, compensation, deductions, etc.), (3) build Schedule L balance sheet by reconstructing BOY balances from known entity facts (incorporation date, loan amounts, retained earnings assumptions), (4) identify critical gaps (bank balances on 1/1 and 12/31, capital stock, prior retained earnings, estimated tax payments) and request them explicitly, (5) confirm filing tool supports Form 1120 (FreeTaxUSA does not).