Our sales tax reporting has changed from quarterly to monthly. If I change this on QBO sales tax settings, it changes all prior reports as well. How do I update this?

Updating your sales tax reporting frequency to monthly is done directly in the sales tax settings, @tlarsen3.

Once updated, the change should only apply to future filings and will not affect any prior reports that have already been filed. In your case, we recommend contacting our Live Support team to thoroughly review your concern and assist you in resolving it. Here's how:
 

1. Sign in to your QuickBooks Online company.
2. Click (?) Help, then proceed to the Search tab.
3. Utilize the search field or open an article.
4. Select Contact Us at the bottom of the Help panel.
5. Decide how you would like to talk with an expert: Chat with us or Have us call you.

Before contacting us, you can check our support hours to connect with the team as quickly as possible.

Post here in the Community forum for further questions about handling your sales tax report. We're here to help you in this thread.