Prepare a Year-End Bookkeeping Packet for Your Tax Preparer
09/20/2026
Written by KanderBooks Tali G.
A common small-business question is: What does my tax preparer actually need from my books? The most useful answer is not a pile of receipts or a last-minute software login. It is a tidy year-end bookkeeping packet: reconciled financial reports, support for unusual transactions, and a short list of questions that need review. This process can reduce back-and-forth, help you spot missing information, and make your records easier to use next year.
This article is general financial education, not tax, legal, or investment advice. Your business structure, accounting method, tax year, state obligations, and industry can change what your preparer needs.
Start with books that match the real-world accounts
Your packet should begin only after the bookkeeping is brought through the final month of the business tax year. Reconcile each business bank account, credit card, loan, payment processor clearing account, and cash account used by the business. Reconciliation means comparing the book balance with the outside statement or report and investigating meaningful differences.
The IRS explains that business records should establish gross receipts, expenses, asset purchases, inventory purchases, payroll, and other business transactions. (IRS business recordkeeping) A recordkeeping system can be electronic, but it must provide a complete and accurate record that remains accessible. (IRS electronic records guidance)
- Confirm that every bank and credit-card statement through year-end has been reconciled.
- Match payment-platform activity to sales, fees, refunds, chargebacks, and bank deposits.
- Review uncategorized, duplicate, and personal transactions before exporting reports.
- Make sure the reporting period matches your actual tax year, whether calendar or fiscal.
Export the core financial reports
Give your preparer reports that summarize the finished books, not just a transaction download. The basic set is usually a profit and loss statement, balance sheet, general ledger, and trial balance for the full tax year. If you use accounting software, export the reports in a stable format and keep a copy of the exact versions you sent.
A profit and loss statement shows the year’s income and expenses. A balance sheet shows what the business owns and owes at the end of the period. The general ledger provides the transaction-level detail behind account totals, which helps a preparer ask focused questions rather than rebuild the books from statements.
- Profit and loss statement for the full tax year, with comparative prior-year figures if available.
- Balance sheet as of the last day of the tax year.
- General ledger detail for the full tax year.
- Trial balance, if your bookkeeping system provides one.
- Accounts receivable and accounts payable aging reports, if you invoice customers or track bills.
Add documents that explain income
Income records should show where the money came from and how reported sales connect to deposits. This is especially important when customers pay through several channels, such as an online store, card processor, marketplace, invoicing platform, or direct bank transfer. Separate sales revenue from sales tax collected, processor fees, refunds, and chargebacks in the records.
Supporting documents can include sales slips, invoices, deposit slips, paid bills, receipts, bank or credit-card statements, and canceled checks. Keeping the source documents organized helps support the entries in the books and tax return. (irs.gov)
- Annual sales reports from each payment processor, marketplace, point-of-sale system, or e-commerce platform.
- Year-end processor statements showing fees, refunds, disputes, reserves, and payouts.
- A summary of other income, such as interest, grants, asset sales, or insurance proceeds.
- Copies of tax forms or notices received that relate to business income, when applicable.
- A brief explanation of large or unusual deposits that are not customer sales.
Document expenses, assets, debt, and owner activity
A clean expense total is helpful, but some items need extra context. Flag large purchases, new loans, loan payments, vehicle activity, owner contributions, owner draws or distributions, reimbursements, and transactions between related accounts. Include invoices, loan statements, purchase agreements, or other records that explain these items.
Assets often need records beyond the current year because their cost and later disposition can affect tax reporting. IRS guidance says to keep property records until the limitation period expires for the year in which you dispose of the property; those records help establish depreciation and gain or loss. (irs.gov)
- Invoices and proof of payment for equipment, computers, furniture, vehicles, or other significant purchases.
- Year-end loan, line-of-credit, and business credit-card statements.
- A list of new debt, refinanced debt, forgiven debt, or owner loans during the year.
- A summary of money the owner put into the business or took out of it.
- Documentation for large repairs, prepaid expenses, deposits, or unusual vendor payments.
Include payroll, contractor, and inventory information
If the business has employees, provide payroll reports that reconcile with the wage expense in the books, along with year-end payroll filings or notices received. Keep payroll records separate from general expense receipts so wage, withholding, benefit, and employer-tax questions can be answered quickly.
For businesses that pay contractors, gather the contractor list, payments by contractor, taxpayer identification information where applicable, and copies of any information returns already filed. Product-based businesses should also provide a year-end inventory count or valuation summary, plus records explaining major inventory purchases, returns, shrinkage, or write-downs. The IRS identifies payroll and inventory purchases as records that belong in a business recordkeeping system. (irs.gov)
- Year-end payroll register and payroll tax filing summaries.
- Employee benefit and retirement-plan contribution records, if applicable.
- Contractor payment summary and copies of relevant contractor tax forms.
- Inventory count sheet or inventory valuation report as of year-end.
- Notes on inventory held at fulfillment centers, warehouses, or consignment locations.
Send a short cover note with open questions
A one-page cover note makes the packet more useful. List the legal business name, employer identification number if applicable, entity type, tax year, accounting method used in the books, contact person, and the location of every file. Then list unresolved questions plainly instead of guessing how to classify a transaction.
Examples include: whether a purchase should be treated as an asset or expense, how to handle a new loan, whether owner payments were recorded consistently, or why payment-platform reports do not appear to match sales reports. The SBA notes that sound bookkeeping and basic financial knowledge support ongoing financial management, including accounts receivable, accounts payable, cash, bank reconciliation, and payroll. (sba.gov)
- Name each file consistently, such as 2026 Profit and Loss Final or 2026 Processor Reconciliation.
- Use a secure sharing method approved by your preparer; avoid sending sensitive tax information in an unprotected email.
- Keep the final packet and the reports actually used to prepare the return with your permanent tax files.
- Write down unanswered questions and provide the supporting document for each one.
Frequently asked questions
Do I need to send every receipt to my tax preparer?
Usually, your preparer will want summarized, reconciled books plus support for significant, unusual, or questioned items. You should still retain organized supporting records, including invoices, receipts, statements, and proof of payment, because they support the entries in your books and tax return. (irs.gov)
What if my books are not finished by year-end?
Do not wait for perfection. Reconcile the available accounts, correct obvious errors, export draft reports, and give your preparer a list of known gaps. Label the reports as draft until open items are resolved. A clear list of missing statements, uncategorized transactions, or unreconciled payment platforms is more useful than silently leaving them out.
Should e-commerce sellers include payment processor reports?
Yes. Processor and marketplace reports can help explain how gross sales became the amounts deposited into the bank after fees, refunds, disputes, and timing differences. Keep them with the reconciliation that ties the platform activity to your sales records and bank deposits.
How long should I keep the year-end packet?
Keep a copy of the final reports, supporting documents, and filed return. IRS guidance generally ties record retention to how long the records may be material for tax administration, and special retention rules can apply to payroll and property records. (irs.gov)
Can my accounting software replace source documents?
Accounting software can be part of a valid electronic recordkeeping system, but the underlying support still matters. IRS guidance says electronic records must provide a complete and accurate record that is accessible, and supporting documents help substantiate what was entered in the books. (irs.gov)
Sources and further reading
This article provides general educational information and is not tax, legal, accounting, or investment advice. Rules and individual circumstances can change; consult an appropriately qualified professional for advice about your situation.
About this author
Tali G. is KanderBooks’ AI editorial pen name. Articles are researched and checked using our automated editorial process. Editorial images are generated for the articles.