Start with your situation
Mark transfers, owner contributions, customer receipts, and personal spending separately. Preserve the original bank evidence so a preparer can review classification questions without relying on a cleaned-up total alone.
Evidence should explain the transaction
Useful records connect an amount to its source, date, purpose, and supporting document. A bank entry shows movement of money but may not explain whether it was income, a transfer, or a business expense. IRS recordkeeping guidance emphasizes a system that clearly shows income and expenses and supports items reported on returns.
Build a searchable evidence trail
Use a consistent filename containing the year, date, vendor or payer, and category. Keep original statements and receipts, plus a short note when the business purpose is not obvious. Reconcile totals to the books and retain a list of missing items. Reconstructed information should be identified honestly; do not invent receipts or turn uncertain estimates into documented facts.
- Separate years and accounts
- Connect entries to supporting documents
- Mark incomplete evidence clearly
Questions to consider
Is a spreadsheet enough by itself?
A spreadsheet is an organizing tool. Supporting evidence may still be needed to establish the nature and accuracy of entries.
Official resources
This guide provides general information. It does not assess your eligibility, establish representation or guarantee an outcome. Check current agency guidance and get advice based on your own facts.