If I create an invoice for labor and materials and also want to include a credit for materials returned, what is the correct way to do that?
If I include a line in the invoice for the credit, what item type should it be? I ask because if that line item is a "non-inventory part" with a negative dollar amount then it does something weird when I pull a "sales tax revenue" report. But if that line item is instead a "discount" item type with a negative dollar amount then the "sales tax revenue" report looks normal, but it doesn't correctly adjust my "sales by item" report.
See Example PDF attached.