Hello DBH,

The Edit Markup link that my colleague is referring to can only be seen if you have the QuickBooks Desktop Enterprise. Other QuickBooks Desktop versions don't have this feature. You can only set up a default markup percentage in the Edit>Preferences (Time & Expenses) setting. 

@vpcontroller has provided you the accurate answer how to hide the markup percentage when printing invoices. However, you can't edit the markup percentage when creating an invoice.

If you have any questions, please let us know. We're here to help.