The short answer is yes, at least if you want an accurate return. Your tax preparer needs organized financial records to calculate your income, identify deductions, and file a return that reflects what actually happened in your business. Without clean books, they’re working with incomplete information and filling in gaps with guesses.

Here’s what typically happens when someone tries to file without getting their books in order. The tax preparer receives a pile of bank statements, maybe some invoices, and a rough idea of what the business earned. They do their best to piece together income and expenses, but they’re making assumptions in places. Deductions get missed because nobody categorized the expenses properly. Income might be overstated or understated. The return gets filed, but it’s not accurate, and you probably paid more than you needed to.

Your accountant isn’t your bookkeeper. Tax preparers are trained to apply tax law, calculate liability, and file returns. They’re not set up to sort through twelve months of transactions, figure out which charges were business expenses, and reconcile your bank accounts. Some will do it, but they’ll charge you for that work, often at a higher hourly rate than a bookkeeper would. You end up paying more for a worse result.

The bigger risk is missing deductions you’re entitled to. If your books aren’t organized, expenses that would reduce your tax bill simply don’t show up. That $200/month software subscription, the mileage you drove for client meetings, the contractor you paid to help with a project. These are all deductible, but only if they’re properly recorded. Over a full year, missed deductions can add up to thousands of dollars in unnecessary taxes paid.

Catch-up bookkeeping doesn’t have to be painful. It involves pulling your bank and credit card statements, categorizing every transaction, reconciling the accounts, and producing financial statements your tax preparer can actually use. If you’re only a few months behind, it’s a relatively quick process. If you’re a year or more behind, it takes longer but it’s still straightforward with the right help.

Getting caught up also gives you something valuable beyond surviving tax season. You get a clear picture of how your business actually performed. Revenue, expenses, profit margins, cash flow patterns. That information helps you make better decisions going forward, not just check the tax filing box.

If you’re behind on your books and deadlines are approaching, the move is to get your small business bookkeeping caught up first and then hand clean financials to your tax preparer. It’s faster, cheaper, and more accurate than asking your accountant to do detective work with raw bank statements. And once you’re current, staying current month to month means you never have to scramble like this again.