Updated November 6, 2026. Quick answer: Send one document per Schedule C line that has an amount: your income records and 1099 forms for line 1, a ledger plus the receipts behind each expense line, a mileage log for line 9 and Part IV, and the home-office and estimated-payment figures. The IRS says supporting documents should identify the payee, the amount paid, proof of payment, the date and a description, so a ledger with the receipt file name beside each row is the whole handoff.
On records for a one-person business: start-up costs under section 195, reconciling a bank statement to your books and a free digital receipt folder method.
On records for a one-person business: what to record for a business meal and the 50% limit, how to match 1099-NEC and 1099-K forms to your books and a quarterly bookkeeping close checklist.
What your accountant needs, and where the IRS says it comes from
This page reads the primary sources linked under Sources, as retrieved on November 6, 2026. Publication 463 is the 2025 edition. Publication 583 is the December 2024 revision.
The IRS describes the records in two groups. For income: “Gross receipts are the income you receive from your business. You should keep supporting documents that show the amounts and sources of your gross receipts.” For expenses: “Your supporting documents should identify the payee, the amount paid, proof of payment, the date incurred, and include a description of the item purchased or service received that shows the amount was for a business expense.” It also says what ties them together: “Your recordkeeping system should include a summary of your business transactions.” That summary, a ledger, is the first thing to send.
The handoff, line by line
| Schedule C item | What to send | Why, and where to read more |
|---|---|---|
| Line 1, gross receipts | Invoices, deposit records and every Form 1099-NEC and 1099-K received | The 1099 total against your ledger; the Schedule C instructions ask for a statement when box 1 totals exceed line 1. See 1099-NEC box 1 |
| Lines 8 to 27a, expenses | The ledger, with a receipt, invoice or statement line behind each row | The IRS wants payee, amount, proof of payment, date and description. |
| Line 9 and Part IV, vehicle | A mileage log: date, destination, business purpose, miles, plus total miles for the year | Publication 463 asks for the mileage of each business use and the year’s total. See the standard mileage rate |
| Lines 24a and 24b, travel and meals | Receipts and a written record of the trip purpose; mark meals separately, because Publication 463 puts them under a 50% limit | See lines 24a and 24b and the receipt rules |
| Line 30, home office | The home figures the method needs: the simplified-method square footage, or the Form 8829 expense records | See the home office deduction |
| Line 48, other expenses | The ledger rows for each type, listed separately | See Part V, line 48 |
| Self-employment tax and estimated payments | The dates and amounts of each estimated payment and any prior-year return | See quarterly estimated taxes |
| Assets and equipment | Purchase date, price and how the asset is used | The IRS lists when and how acquired, purchase price and how you used the asset |
Three ways to hand it over
The IRS lets you “choose any recordkeeping system suited to your business that clearly shows your income and expenses”. Three formats work in practice.
- A CSV ledger and a receipt archive. One spreadsheet row per transaction with the receipt file name in a column, and a folder of the images. Costs nothing and travels by email. It matches the setup described on the scanned-receipts page.
- Accountant access inside an app. Some receipt and bookkeeping apps give the accountant their own login. SparkReceipt’s home page says the accountant seat costs nothing; Dext’s US home page says business owners and their accountants work from the same numbers in one place. Read the vendor’s current plan page before relying on either.
- A shoebox. Possible, and the IRS standard still applies to what is in it. The cost to a preparer of sorting it is not stated in any source read for this page, so this page makes no claim about the price difference.
What not to send
Do not send a card statement as a substitute for the receipts: Publication 583 warns that “Proof of payment of an amount, by itself, does not establish you are entitled to a tax deduction.” Do not send personal and business charges mixed with no marking, and do not send a year of photos with no ledger. An accountant working from images alone has to rebuild the summary the IRS says your system should contain.
Software is one option
A receipt app is worth considering if the main pain is collecting and sorting. If you already keep a clean ledger and a dated folder, you do not need one. The two links below are affiliate links, and the spreadsheet-and-folder route above remains a full alternative. For the wider decision, see the guide to Receipts and expense records for a one-person business.
Common mistakes
- Sending receipts in an unsorted pile with no ledger. The summary of transactions is part of the IRS record, not an extra.
- Forgetting the 1099 forms. Line 1 is built from your own records and checked against them.
- Leaving out the mileage log. Without it the vehicle lines depend on memory.
- Waiting until the filing deadline to organize the year. A record made at the time is worth more than one rebuilt later.
Related: Schedule C (Form 1040), Bookkeeping for a One-Person Business, and IRS receipt rules for business expenses.
Sources
- IRS, What kind of records should I keep
- Instructions for Schedule C (Form 1040) (2025)
- IRS Publication 463 (2025), Travel, Gift, and Car Expenses
- IRS Publication 583 (Rev. December 2024), Starting a Business and Keeping Records
Read from the IRS documents linked above on November 6, 2026. General information, not tax advice. Your own facts decide the outcome, and a preparer, the account provider or the IRS is the right place to confirm anything consequential.