Thanks for sharing your insights and feedback, @bbjacks2000,

Having the automatic rounding turned off in QuickBooks is definitely a handy feature when added in the program. This would save time so you won't manually adjust any taxes derived from the invoices. 

Our product developers take utmost effort to bring useful enhancements and updates based on what our customer needs. I'm personally sending this request to our engineering team and your vote for this one.

In the meantime, you can follow the suggestion to adjust the taxes manually to ensure accurate tracking on your quarterly returns. Check out the links below based on the program you're using:

QuickBooks Desktop: Process sales tax adjustment.

QuickBooks Online: Create or delete a sales tax adjustment.

If you have any other questions, let me know and I'll be happy to help. Thanks again for checking out our forums and have an awesome Thursday!