Bank statements form the foundation of any bookkeeping cleanup. Every transaction that moved through your accounts shows up here, which becomes the baseline for reconstructing your records. You need statements for every business bank account covering the entire period being cleaned up. If you bank online, downloading PDF statements takes a few minutes. If some months are missing, your bank can provide copies going back several years.

Credit card statements come next. Every business credit card used during the cleanup period needs full statements. If you’ve been mixing personal and business expenses on one card, that’s workable. The business transactions get pulled out and the personal ones ignored. But we need to see everything to know what’s there.

For catch-up bookkeeping to be accurate, loan documents matter too. If you have outstanding loans, lines of credit, or equipment financing, provide the original loan documents plus monthly statements. These show principal and interest breakdowns needed for proper expense categorization and accurate liability balances.

Payroll records are essential if you have employees. Prior pay stubs, payroll tax filings like quarterly 941s and state returns, and year-end W-2s help verify that wages and tax liabilities match what was actually paid. If you use a payroll service like Gusto or ADP, access to that account works in place of paper records.

Prior year tax returns give context for how things were recorded before and what the IRS saw as your financial position. They also reveal depreciation schedules, carryforward losses, and other items that affect current books.

Access to your existing accounting software is critical. QuickBooks Online login credentials, QuickBooks Desktop backup files, or exports from whatever system you’ve been using. Even if the data is messy, starting from what exists saves significant time compared to rebuilding from scratch.

Receipts and invoices help but don’t stress if they’re incomplete. Bank and credit card statements prove transactions happened. Receipts add detail about what was purchased. If you have organized files, great. If you don’t, cleanup can still move forward. Vendor invoices for larger purchases and customer invoices for revenue matter more than every small receipt.

1099s you’ve received from clients and 1099s you’ve issued to contractors help verify that income and expenses match what’s been reported to the IRS. If you’re unsure which 1099s exist, bank records can fill in the gaps.

Don’t let missing documents stop you from starting. Merrimack Valley bookkeepers work with whatever records exist. Banks reissue statements. Payroll services store years of historical data. Credit card companies keep records going back a long time. Part of the cleanup process involves tracking down missing pieces, and most gaps can be filled once work begins.