Thank you for the information, dorretti.

The information below is just based on the product investigation made by the team about reclassifying GST free sales to GST 10% sales. If this is not the same with what you are trying to reclassify. I would recommend contacting our Customer Support through Chat or Phone. That way, one of our support agents can take a look in your account and the transaction you wanted to change in a secure form.

Use this link to contact support https://quickbooks.intuit.com/learn-support/en-au/contact or through the Help panel in QBO.

1. Sign in to your QuickBooks Online account.

2. Click on Help (?).

3. In QuickBooks Assistant, enter a short summary of your concern.

4. Select on Contact Us.

5. Choose a way to contact us:

• Live chat M-F,8:30AM to 6:30PM and S-S 8:00AM to 8:00PMm AET.
• Call us M-F, 8:30AM to 6:30PM AET

Feel free to post again in the Community if you have any other questions.