1099 Misc Setup...Apply Sales Tax

We didn't setup the "Apply Sales Tax" on the Misc. Setup for 1099N. (Set Up Financials/Supply Chain -> Product Related -> Procurement Options -> Withholdings -> Withholding Entities) Now the basis amount for 1099s is missing the Sales Tax....if we "Apply Sales Tax" from the Misc Setup and rerun the 1099 withholding process will it adjust the basis amount?

If not, is there a way to globally change it to properly include sales tax?

9.2 Image 30 Ptools 8.56