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Completing your last GST BAS

What to include when completing your BAS after cancelling your GST registration.

Last updated 14 September 2026

You must complete a BAS for the tax period your registration cancellation 'date of effect' occurs in.

You must report all the following information:

Find out how to make an adjustment on your BAS.

If you operate on a cash basis, you will need to record all the sales and purchases that still need to be attributed from a previous tax period.

You also need to:

  • lodge any outstanding BASs
  • account for any outstanding GST amounts.

If you still have PAYG withholding, PAYG instalments or fringe benefits tax obligations, continue to report these obligations to us on an instalment activity statement.

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