I imported totals from my previous accounting system on 5/15.  Under the Taxes settings I had created a Tax Rate called "IA + Local Option" which is 7%.  The sales tax payable from my old system was imported that account which would seem to be correct and is under the liabilities.

However, the system seems to have its own liability account for sales tax called "Sales Tax Payable" which I can't modify.  And all sales taxes from my invoices go into this account.  The first invoice I created was on 5/15 and it's sales tax of $4.90 somehow became the opening balance for "Sales Tax Payable".  Now my sales tax due is off by $4.90

How do I fix this?