Hi there, @sarahammandavis.
Thanks for reaching out to us.
The Added Tax Group will only appear in the audit log once you've created an invoice with multiple states affected or if it has a new state tax.
Every time you edit a transaction in your account, the added tax group will always appear in your Audit log. Even if the rate hasn’t changed, the system still checks those new taxes in each of the transactions edited.
You can visit this article for more information on how sales tax is managed tax to make it easier for you to collect, report, and pay your sales tax:
Frequently asked questions regarding Sales Tax in QBO.
For future reference, you might want to check this article for the sales tax center's key features: Use Automated Sales Tax Center.
Let us know if you have any other concerns. We'll be around to help.
