Aloha...Payroll Advance deduction is a required calculation in Sage 100 Contractor, even if you don't plan on utilizing it.  You can see the Sample Company for example of how to set it up.

Kathy Gotzenberg

Sage 100 Contractor Certified Consultant

This may not be the answer, but it is a suggestion on troubleshooting the problem.  Reasoning in finding out what is triggering a Payroll Advance Deduction.

The problem may be related to the 5-2-1 "Advances Withholding" Payroll Calculation.  I would go back through your computed payroll records for each employee and verify that there is no amount calculated in the "Advances Withholding" payroll calculation.  Also verify that none of the calculated payroll records have "#5-Payroll Advance" as its Type.  Assuming this is your first payroll, there should be no previous Payroll Advances paid, unless there Advances Due from the previous year or set of books that were carried over.

If you have no payroll records that are of the type "#5 - Payroll Advance" and none of the payroll record calculation tables shows $$ amounts calculated in the "Advances Withholding" Calculation line, then there should be no occasion for the Payroll Advance Deduction.

Unless, under 5-2-1 "Compensation" Tab somehow amount(s) were manually entered into the Advances Due cell.   If any of your employees show Advances Due in the Compensation tab of their employee record, then that may be the source of your problem.  If Advances Due exist in the employee record but there is no previous GL entry to record an actual previous Advance, it's plausible that the system sees nothing to post the "Advances Withholding" deduction against.  Any time there are Advances Due, the Payroll Module AUTOMATICALLY deducts the amounts.  See Notes in Sage Example 1 in "Recovering Payroll Advances" in Sage Help.

If all of these things above are verified and there are no Advances Due, not Payroll Type #5 Advances, and no $$ calculated for Advance Withholding in the payroll Records,  I would  suggest going through and Toggling OFF the Advance Withholding for all employee calculations, Recalc and try Posting again.