If any of your Payees are being paid into bank accounts which have a combination of dollar and percentage values, 

1. The Bank Accounts with percentage values can be defined in Payment Method once FAST-Bank is selected.
2. The Bank Accounts with dollar values are defined by
   1. Adding a User Modified After Tax Deduction (Available in Deduction Banking and Repayments).
   2. Adding the After Tax Deduction in Deduction Banking and Repayments for the specific Payee.