- Check the 1099 box on the Voucher
- Go to the Vendor supertab and find the Vendor
- In the 1099 Adjustment box enter a negative amount equal to the amount of the voucher that should not be considered
- Optionally, you could leave the 1099 box unchecked on the Voucher and simply add the amount needed for the 1099 Report into the 1099 Adjustment box
If the voucher wasn't split during data entry, then the use of the 1099 adjustment box is required.