Hi,
If you see after adding Payment Gateway Fees, you are not able to see it in invoice then please follow below setups:
- Login into your WHMCS Admin panel
- Navigate to Setup->General Settings-> Click on Other tab
- Search for "Attempt to load all files" and tick on it
- Now click on Save changes
Done, now create an invoice and you will have fees in place for your invoices.
Regards
WHMCSModule Networks