Question
I entered contributions, but there's no C-3 report.
Answer

In-kind contributions don’t go on a C-3 report, monetary contributions do.

If you entered monetary contributions but they aren’t on a C-3 report, they may be undeposited items. If the Undeposited Items button is green, click it.

Click the box next to a contribution to select it, then click the Add button. Enter the date of deposit for the contribution. Click the Save and File button to submit the C-3 report or click the Save button if you want to submit the C-3 later.