--- title: "Undo Mistakes in QuickBooks Online: Safe Fixes | MCC" description: "Fix wrong accounts, misapplied deposits and closed-period errors without deleting history. Worked example." url: "https://mcc-solutionsnj.com/bookkeeping/guides/how-to-undo-mistakes-in-quickbooks-online" --- Bookkeeping guide · Updated October 12, 2026 # How to Undo Common Mistakes in QuickBooks Online Everyone makes errors while learning accounting software. The goal is to correct them cleanly, so reports are right and there is a clear trail. Before changing anything, find out whether the period is closed or reconciled. By [Matthew Coleman](/about), MCC Solutions **Quick answer.** Before undoing a mistake in QuickBooks Online, open the transaction and read its history and linked items. An invoice with a payment attached cannot simply be wiped. Deleting removes the item from reports, while voiding keeps the record. Want this handled for you? Monthly bookkeeping, cleanup and year-end close for small businesses. Start with a free health check of your books. [Free health check](/bookkeeping/health-check)[Get a quote](/bookkeeping/#interest) **Related:** [Void vs delete a transaction](/bookkeeping/guides/voiding-vs-deleting-transactions) · [NJ 1099 contractor rule (ABC test)](/bookkeeping/guides/nj-independent-contractor-rule-abc-test-2026) · [Trial balance explained](/bookkeeping/guides/trial-balance-explained) **Free tools:** [Net profit margin calculator](/bookkeeping/net-profit-margin-calculator) · [Early payment discount calculator](/bookkeeping/early-payment-discount-calculator) Working through a backlog? The [QuickBooks Cleanup Kit](/toolkits/quickbooks-cleanup-kit) is a step-by-step checklist, a reconciliation log and a READY or NOT READY page for your books. [![Intuit ProAdvisor Gold tier badge](/img/credentials/intuit-proadvisor-gold.png)](https://proadvisor.intuit.com/app/accountant/search?searchId=matthew-coleman77)Gold tier in Intuit's ProAdvisor program. [See my Intuit listing](https://proadvisor.intuit.com/app/accountant/search?searchId=matthew-coleman77) Keeping your own books? Tallyfinch does invoices, bank import and reports on your computer. [See Tallyfinch](/bookkeeping/mcc-books-downloadable-bookkeeping-software) ## First, look before you delete Open the transaction and read its history, including the linked items. An invoice with a payment attached cannot simply be wiped without handling the payment. The Audit log shows who changed what and when. Take a screenshot or note of the original values. Deleting removes the item from reports, while voiding keeps the record at zero, which is often better for paper trails such as checks and invoices. ## Void or delete? Void a check, invoice or payment when you want to keep the document number and show it was cancelled. Delete when it was created in error and never had any effect. If the item was already reconciled, voiding it will change the reconciled balance, so you must handle the reconciliation too. Ask a bookkeeper if you are unsure which action applies. ## Wrong account or category If an expense went to the wrong category, edit the transaction and choose the correct one. For many transactions, use the batch edit tool or reclassify transactions tool, found in the accountant tools. For money posted to the wrong bank account, correct the account field. For a transfer recorded as an expense, replace it with a transfer so neither income nor expense is distorted. ## Deposits, payments and undeposited funds A customer payment applied to the wrong invoice should be unapplied and reapplied. A deposit that does not match the bank is usually a grouping problem: payments in undeposited funds need to be combined into the same bundle as the bank deposit. Do not create a new income entry to make the numbers match, because it duplicates revenue. ## Want us to handle it? We get behind or messy books current, tell you what we found, and hand you a clean starting point, in QuickBooks, Xero or Excel. **Price:** Free review of your books first, then a written quote before any work starts. [Get a free review and quote](/bookkeeping/#interest) [How catch-up and cleanup work](/bookkeeping/catch-up) ## Closed periods and reconciliation If you or your accountant set a closing date, QuickBooks asks for a password or blocks changes before that date. Respect that. When a mistake is in a closed period that has already been reported or filed, the right approach is often a correcting entry in the current period, with a note, rather than reopening history. Ask your CPA first. To undo a reconciliation, use the option to undo the last one on the reconcile page, but only after reviewing the effects. If it is older, a bookkeeper may need to rebuild it. Always back up or export key reports, such as the trial balance and the profit and loss, before making large changes. They give you a before-and-after comparison. ## When to ask for help Call a bookkeeper or ProAdvisor when the mistake touches payroll liabilities, sales tax, opening balances or anything already reported to an agency. Those areas have a ripple effect across reports, and a quick fix can create a bigger problem. Bring the audit log entries, screenshots and a clear description of what you expected to see. ## Worked example with numbers A $500 customer payment was deposited straight to Sales instead of being applied to invoice 1042. That counts $500 as income twice: once on the invoice and once on the deposit. Fix: edit the deposit to remove the sales line, receive the payment against invoice 1042, and group it with the deposit. Receivables drops by $500, income is no longer overstated, and the bank register still matches. If the month is already reconciled, do the fix in a way that does not change reconciled amounts, or ask your accountant. ## Mistakes that cost money Deleting reconciled transactions. Voiding when an edit would do. Fixing a symptom by plugging a number into another account. Making changes in a closed period without telling the preparer. ## Check your work After any correction, run the aging report, the profit and loss, and the reconciliation report for the affected months. ## Common questions **Will deleting a transaction affect past reports?** Yes. Reports for the period of that transaction change, which is why closing dates matter. **How can I see what I changed?** Use the Audit log in settings. It lists edits, deletions and users. This guide is general information, not tax, legal or accounting advice. Rules, fees and due dates change; check with the IRS, the NJ Division of Taxation or a licensed professional for your situation. Let us handle it [### Monthly bookkeeping Categorizing, reconciling and monthly reports, with cleanup, payroll and NJ filings available. Bookkeeping →](/bookkeeping/) [### QuickBooks Online Monthly bookkeeping, cleanup and reconciliation in QuickBooks Online for New Jersey small businesses. Your account stays in your name. QuickBooks →](/bookkeeping/software/quickbooks-online) More guides - [Building Custom Reports in QuickBooks Online](/bookkeeping/guides/quickbooks-online-custom-reports) - [Using the QuickBooks Online Audit Log](/bookkeeping/guides/quickbooks-online-audit-log) - [Undeposited Funds in QuickBooks Explained](/bookkeeping/guides/quickbooks-undeposited-funds-explained) - [Set Up Invoicing and Online Payments in QuickBooks](/bookkeeping/guides/quickbooks-online-invoicing-and-payment-setup) Free tool - [Bookkeeping health check](/bookkeeping/health-check) [All guides](/bookkeeping/guides) Reach small business owners, freelancers and bookkeepers who read this guide: [advertise here](/advertise#bookkeeping). Do it yourself ### Chart of Accounts and QuickBooks Import Pack Start your books with an account list built for your type of business, instead of the generic default, and compare it with the accounts you already have. [See what's inside ($24)](/toolkits/chart-of-accounts-quickbooks-import-pack)14-day full refund ## Rather have us keep the books? Ask for a quote. [Get a Quote](/bookkeeping/#interest)[Call (908) 444-6373](tel:+19084446373)