If a salesperson's GST or withholding tax rate has been changed in OfficePartner, you may need to recalculate the commission on an existing invoice.
Tip: Check a salesperson's details in OfficePartner > Salespeople > open salesperson > Utilities tab > Salesperson Details > Office Details tab.
To recalculate an invoice commission open Salespeople > open a salesperson > Invoices tab.
Only an incomplete invoice can be recalculated. Click UC to un-complete a completed invoice. You'll be prompted to deduct year to date totals accordingly - click Yes.
Now you can right-click the invoice to Reset Commission Details. This will recalculate the GST / Withholding tax so you can then do a correct pay run and complete the invoice.