Hi,
I think a setup is missing in the particular form.
Go to IRS Reporting Period -> Forms -> In Action click on Edit Statement. You need to do this for the NEC form as that is why you are trying to print.
Now in the next screen make sure that there are lines with Print Value Type as Amount. Not all but some lines should be there with Amount.
Basically Statement lines specified how the form will be printed.
Below is the screenshot of blank setup. You setup should have lines and there should be lines with Amount as well.
Regards,
Dhiren.