Welcome to the thread, @Tamac.
You can change the sales tax rate whenever you'd want. Since when creating a transaction and apply the sales tax, that would be the effective date.
Moreover, you can add a Memo to the transaction to manually track the effective date of the Sales tax.
To edit the sales tax rate, follow the below steps:
- Go to List menu at the top, then pick Item list on the drop-down.
- Locate your Sales Tax item, then right-click and select Edit item.
- Enter the new rate on the Tax Rate (%) section, then hit OK.
For future reference, you can also check out this article and click the Sales tax item drop-down on step 4 for more information: Set up sales tax in QuickBooks Desktop.
I'd be glad to answer should you have any additional questions about the process, just leave a comment below. Have a wonderful day ahead and take care.
