How do I make an adjustment to my GST payable for a prior period? thank you

Hello there, john151.

To adjust a previously filed BAS period to match what you submitted to the ATO, you can reach out to our Customer Care Team. We can pull up your account and un-lodge the BAS, so you can make some changes.

Here are the steps:

1. Click the Help icon located in the upper right-hand corner.
2. In the Help window, click the Contact Us button located at the bottom.
3. Enter your question and click Let's talk.
4. Select Start messaging or Get a callback.

Feel free to leave a comment if you have any additional questions. Take care.