Monthly-Sales Tax Report vs General Ledger Sales Tax account balance

I would like to learn how to reconcile the monthly State Taxable/Exempt Sales report with the General Ledger account State Sales Tax Payable balance.

How do I check that each General Ledger Income Account balance totals into the Taxable/Exempt Sales report on a monthly basis.

If I add a G/L income account, how does the monthly sales tax report know to include the monthly balance in the Total Sales for the month?

Right now, I have more monthly Revenue in the Income Statement than I have Total Sales in the Taxable/Exempt Sales report for the same month. I do not see that exact difference in any one G/L account balance. I cannot pinpoint what the issue is to correct the discrepancy. I could sure use some "Sage" advice.

Thank you-