How do i adjust GST on purchases

Hi david259,

Thank you for reaching out to us. 

The GST amounts showing on your BAS is based on the transactions with GST on it. You can check the transactions entered on a particular period and ensure that it has the correct GST on it. 

However, if you have lodged your BAS already and made any changes to that period since the lodgement will automatically appear as amendments to that BAS. You can run a report called GST Amendment report to check the amendments. 

You can also have your BAS unlodged if you would like to adjust the BAS amount by contacting our support team. Here's how:

1. Log in to your QuickBooks Online account.
2. Go to the Help menu at the upper right.
3. In the Search bar, type Contact Us.
4. Click the Contact Us option.
5. Choose Callback.

For your reference, you can also check these articles: 

What to do when BAS amounts look incorrect

Can you please tell me how to make a GST adjustment for the BAS

Feel free to leave a comment below if you need any help. Have a nice day!