Note: The Custom Credits report is used by VITA offices for grant purposes, primarily to capture information about state credits. That said, any ProWeb office can use this report to keep track of certain numerical bits of info in a return, but most offices will find the existing ProWeb reports as well as web reports to be adequate for all their informational needs.
Custom Credits will appear as part of the electronic filing process if a custom credit template has been added in ProWeb configuration. If the credit has been marked required, the preparer will not be able to continue until an amount is entered from $0 on up.
Here are some examples of entries in the Custom Credits menu. The first is titled "Word fired stove credit", and the asterisk indicates an amount is required. The second is titled "Wetlands credit" and entering an amount isn't required:
ProWeb: E-File Process Submission Page