To turn on this permission go to settings>permissions>Allow co-broke commission on disbursement. 

After the permission is turned on you can go to a transaction and create a disbursement
In the disbursement you will see add Co-Broke Commission field

When you click Add Co-Broke Commission a screen will open to fill out the information. You will need an item name - this would be what you call this particular fee. If desired, you may add a vendor name and comments for specificity as well. You'll then want to add a percentage or flat fee dollar amount. Make sure to save.

You can see the below the co-broke amount is deducted off the brokerage gross and then you get the brokerage gross after the co-broke fee.
Then you will see the pre-commission debit is deducted off the brokerage gross after the co-broke fee is deducted. 

Then you can see the agents commission and any credits and debits.

Then you have your final commission breakdown at the bottom. 

Then you can create the disbursement and that will save the financial information in the system.