GST

Thank you for posting here in the Community, @user113.

I can share some clarification about the taxes in QuickBooks Online.

The system creates a set of GST/VAT codes automatically based on the information we receive from your state agency. If there's a need for you to correct the tax amount, we recommend setting up a new rate instead of updating an existing GST code.

The previous rate may have been used on prior transactions, and adjusting it could affect your sales tax tracking. To add a new one, here's how:

1. In the Tax Centre, select Add Tax. 
2. Choose which type of tax rate you want to set up. 
3. Enter the details of your tax rate. If you need help with this screen, select the help button (yellow question mark).
4. Select Done when finished.

I've also included some articles in case you need more ideas about GST in QuickBooks:

• How do I set up sales GST/VAT rates and use them on forms? (International QBO)
• FAQ for GST in QuickBooks Online
• Applying Sales Tax to Transactions and Sales Forms

Let me know in the comment section below if you have any other questions. Have a great day ahead.