Hi Diane18,
Making sure your tax amounts are accurate is a progressive step towards keeping your books clean. I'll be happy to assist with getting to the bottom of this so you can manage your business with peace of mind.
QuickBooks is designed to help reduce the amount of work you have to put it when it comes to accounting calculations. Based on what you've described, I highly recommend contacting our support specialists so they can share your screen and accurately assist you with your taxes. The Tax Agency Detail Report would be the best report for you as it shows the transactions that correspond the box number on the sales tax return. To access this report, go to Reports > Suppliers & Payables > Tax Agency Detail Report. You can also run the Tax Agency Report which shows you the information for each lines of the sales tax return. To access this report, go to Reports > Suppliers & Payables > Tax Agency Report. When you get a chance, check out this article with info on: Reviewing sales tax reports.
In case you decide to speak with one our support specialists, here's are our contact details. Let me know if you have other questions. I'll be one message away.
