How to Adjust QuickBooks Online for Sales Tax Errors (USA)
There are two main ways to fix sales tax errors in QuickBooks Online:
- Correct the source transactions (recommended whenever possible)
- Use a sales tax adjustment (only for small differences or closed filing periods)
1. Correct the Wrong Tax Code on the Original Transactions (Best Method)
If the wrong sales tax rate or code was used, the proper fix is to edit the invoices or sales receipts.
- Open the incorrect invoice or sales receipt.
- Change the Tax Code to the correct one.
- Re-save the transaction.
- If a payment was already applied, QuickBooks Online keeps it intact.
- Re-run the Sales Tax Liability Report to ensure the tax adjusts.
Note: If the period is already filed, editing transactions will create “post-filing adjustments” in QuickBooks Online. This is acceptable, but check your tax agency rules, as some require amended returns.
2. Make a Sales Tax Adjustment (If You Cannot Edit Invoices)
Use a tax adjustment if:
- The filing period is locked
- The tax authority does not allow changing past invoices
- There is a small rounding difference or minor tax error
How to Enter a Sales Tax Adjustment in QuickBooks Online
- Go to Taxes → Sales Tax
- Select the tax agency (e.g., State Tax)
- Click Record Tax Adjustment or Adjust (depending on your version)
- Choose Increase (if you owe more tax) or Decrease (if you over-collected)
- Select the Reason:
- Wrong tax code used
- Credit note
- Rounding
- Prior period correction
- Customer refund adjustment
- Exempt sale correction
- Choose an account:
- Sales Tax Adjustment Expense (for under-collected tax)
- Other Income (for over-collected tax you must remit)
- Sales Tax Payable (for corrections offsetting the liability)
- Enter the amount of the adjustment
- Save the adjustment
When to Use Each Method
| Situation | Best Fix |
|---|---|
| Wrong tax code on invoice in an open period | Edit the invoice |
| Wrong tax code but invoice belongs to a filed period | Enter a Tax Adjustment |
| Small rounding differences | Tax Adjustment |
| Data import errors | Correct transactions, then adjust if needed |
| Multiple invoices affected | Bulk edit or reclassify (limited in QuickBooks Online) |
Bulk Fix Option: Sales Tax Reclassifications (QuickBooks Online Accountant Only)
If you have QuickBooks Online Accountant, you can use the Reclassify Transactions Tool to change tax codes in bulk:
- Accountant Tools → Reclassify Transactions → Filter → Batch change tax codes
Normal QuickBooks Online subscriptions do not have this feature.
Common Sales Tax Errors and Their Fixes
- Tax applied to a non-taxable item: Edit the item, assign correct tax code, and re-save invoices
- Exempt customer charged tax: Edit customer profile → Exempt, then re-save invoices
- Imported invoices had wrong tax: Bulk edit if possible, otherwise manually correct
- Wrong tax agency selected: Edit tax code to correct agency, QBO recalculates liability