Hello there, Joe.
Let's discuss the reason behind this issue.
Please note that changing the accounting method will affect how data is displayed and calculated. It’s expected that certain figures may reset because accrual and cash basis accounting handle transactions differently.
The tax summary section depends on specific mappings of general ledger accounts to tax categories. Changing the core accounting method can disrupt these connections.
For better account mapping and categorisation, I recommend reaching out to your accountant, as they are knowledgeable about these processes.
Also, to learn more about the accounting method, please feel free to check out this article: Choose between cash and accrual accounting methods in QuickBooks Online.
If you have any additional questions or concerns about QuickBooks, please let me know in the comments below. I’d be happy to assist you. Stay safe, and have a great day!