Start by figuring out what’s actually wrong. Run a balance sheet and profit and loss report. Do the numbers look reasonable? Check your bank and credit card reconciliation status. Are all accounts reconciled through last month? Look at your chart of accounts and see if there are dozens of accounts you don’t recognize or never use. These quick checks tell you whether you’re dealing with minor tidying or a major reconstruction project.

Bank reconciliation problems are usually the first priority. If accounts haven’t been reconciled in months or years, start there. QuickBooks shows uncleared transactions that should help you match what the bank had versus what QuickBooks recorded. Be prepared to find duplicates, missing transactions, and entries that don’t match actual bank activity. Work through one month at a time, oldest first. Don’t skip ahead or you’ll create more problems.

Uncategorized and miscategorized transactions are the next layer. Look for transactions sitting in “Ask My Accountant” or “Uncategorized Expense” or similar holding categories. These need to be assigned to proper accounts. While you’re at it, spot check other transactions. That $3,000 charge to “Office Supplies” is probably something else. Contractors often find job costs buried in general expense categories where they should be assigned to specific projects.

Duplicate transactions happen when bank feeds import transactions that were also entered manually. Run a transaction detail report sorted by amount to find duplicates. Delete the extras, keeping the ones that are correctly categorized and have the right payee information.

Clean up your chart of accounts by merging accounts that mean the same thing. You don’t need both “Office Supplies” and “Office Expenses.” Delete accounts you never use. Make sure your account structure matches how you actually need to see your finances. For contractors, this means having accounts set up to support job costing properly.

Vendor and customer records often need cleanup too. Duplicate vendors, misspelled names, and customers entered multiple ways all make reporting messy. Merge duplicates and clean up names while you’re in there.

The honest reality is that QuickBooks cleanup can take anywhere from a few hours to dozens of hours depending on how long the file has been neglected and how many transactions are involved. A file that’s a few months behind with 50 transactions per month is manageable for most business owners. A file that’s two years behind with hundreds of monthly transactions is a different project entirely.

If the cleanup feels overwhelming, that’s a sign you probably need help. Catch-up bookkeeping services exist specifically for this situation. A bookkeeper who knows QuickBooks and understands your industry can work through the mess faster than you can, and they’re less likely to make new errors while fixing old ones.

Once your file is clean, keep it that way. Reconcile accounts monthly at minimum. Code transactions to the right accounts and jobs as they happen. If you’re a contractor who needs job-level reporting, make sure every expense hits the right project. A contractor bookkeeper in American Fork can set up systems that prevent the mess from building up again.