Hi sevans,

Technically, putting a discount and choosing the income account will work.

You can also create a Vendor Credit, and use it to offset your bill.

 To create a vendor vendor credit:

1. Go to Vendors and choose Enter Bills.
2. Click the Credit radio button above the word Credit.
3. Enter the name of the vendor in the VENDOR field.
4. Add your commission item to the table.
5. Click Save & Close.

To apply the credit to the bill:

1. Open the bill, and click Pay Bill.
2. Click the Set Credits button.
3. Choose the credit you created.
4. Click Done. You'll see the amount applied in the CREDITS USED field.
5. Remove the amount in the AMT. TO PAY field if you're not paying the bill in full.
6. Click on Pay Selected Bills.

If you have other questions, please let us know.