Sage 100 Contractor now has the ability to add "use tax" to vendor payables that will automatically charge the same account (job materials) and then credit the sales tax payable account.  or you can designate specific accounts to be affected.  Look at menu 1-8 Posting accounts.  But it sounds like you only want to charge the job the pretax amount and then a new contra liability account called "sales tax paid".  If you use the use tax feature there is a use tax report at menu 4-1-7.  Try setting it up in a play data set to make sure you get the results you want, or even the Sage Sample Co

Sage 100 Contractor now has the ability to add "use tax" to vendor payables that will automatically charge the same account (job materials) and then credit the sales tax payable account.  or you can designate specific accounts to be affected.  Look at menu 1-8 Posting accounts.  But it sounds like you only want to charge the job the pretax amount and then a new contra liability account called "sales tax paid".  If you use the use tax feature there is a use tax report at menu 4-1-7.  Try setting it up in a play data set to make sure you get the results you want, or even the Sage Sample Co

Agree that the "Use Tax" in Sage100 is super helpful, but that is only half of the equation. Sage really needs to provide the ability to track BOTH Use Tax and Sales Tx Paid @ Source. They go hand in hand and need to be tracked separately

"But it sounds like you only want to charge the job the pretax amount and then a new contra liability account called "sales tax paid".

Yes this is exactly what I want. Not sure how to get it setup correctly. Then if I can get a report on the amount of tax I paid that shouldn't have been taxable I have the information I need file my ST-101

The problem I see with Use Tax is when you run Job Cost the Use Tax is taken into account. I don't want the Use Tax in the job cost report 6-1-2

Then don't job cost the tax portion.  Book it to prepaid sales tax and deducted it when you file