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How do I revise a lodged BAS?

Lodging is permanent, but it isn't final — if you find a mistake after a statement is Lodged, you can send the ATO a revision. Your changes are kept as a pending revision on the statement: the figures the ATO holds don't move until you submit, and you can discard the revision at any point before then.

Step 1. Go to Tax → Activity Statements and open the lodged statement. Its status badge shows Lodged (or Revised, if it's been revised before — you can revise again).

Step 2. Click Edit on the section card you want to correct — GST, PAYG Withholding, PAYG Instalments or Fringe Benefits Tax. The inputs open pre-filled with the figures as lodged.

Step 3. Change the amounts and click Save. You'll see "Revision saved." Repeat for any other section that needs correcting — you can edit one section at a time. Derived figures (like 8A, 8B and 9) recalculate automatically from your changes.

Step 4. (Optional) Click Validate to check the revised figures with the ATO before submitting. Any issues appear in the validation banner — see My BAS validation failed — what do I do?

Step 5. Click Submit revision. The declaration box opens, titled Submit revision of your form and period (for example "Submit revision of BAS-A for Apr – Jun 2026?"). Check the summary figures — they're the revised amounts that will be sent. Enter the Signatory name, tick the declaration, and click Submit revision to ATO.

When the ATO accepts it, the status changes to Revised and you get a new ATO receipt. The Document ID stays the same — a revision replaces the figures on the same statement, it doesn't create a new one. The Lodgement history section at the bottom of the page lists the original lodgement and every revision, each with its own receipt.

Changed your mind?

While a pending revision exists, a Discard revision button appears in the toolbar. Click it to throw away your unsubmitted edits — you'll see "Revision discarded." and the statement returns to its lodged figures. Nothing was sent to the ATO.

Good to know

  • A failed revision never un-lodges anything. If the ATO refuses the revision, the statement keeps its Lodged / Revised status and your original lodgement stands. Fix the figures and submit the revision again — see My BAS was rejected by the ATO — what now?
  • Statements lodged outside myaccountant can be revised too. If a statement was lodged through another channel, opening it shows a notice that the figures are what the ATO holds — edit a section and Submit revision works the same way.
  • This flow applies to every activity statement type, not just the BAS — an IAS or annual GST return revises the same way.
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