Welcome to the Sage Construction and Real Estate products Support Group on Community Hub! Available 24/7, the Forums are a great place to ask and answer product questions, as well as share tips and tricks with Sage peers, partners, and pros.
If you enter an AP invoice, just put the discount amount in the discount field an it will credit discounts earned/taken so the net amount due is all you pay. If you post though 1-1 because you pay online, then debit sales tax payable for the full amount, credit discounts earned/taken and credit your checking account for the balance.