WI Tax Credits Catch 22

Trying to e file my 2020 Wisconsin state return.  I am a disabled vet who qualifies for the Veterans Property Tax Credit, this means that according to WI rules I cannot claim the $300 school property tax credit.  The $300 was added to line 13 of my return automatically so, since the Veterans credit is much larger I overrode the $300 school property credit and entered my Veterans property tax credit in the correct place.  Now the final step before submitting my returns has brought the process to a halt.  The final analysis tells me that I cannot override the $300 school property tax to $0, so I reverse the back out and then try to file it tells me that I cannot claim the Veterans property tax credit if I also am claiming the school property tax credit.  I believe you have a glitch in the WI state taxes software.  I want to e-file and already paid the $25 fee but the software is stopping me from filing.  Please advise if I have to file by mail and if I do, how do I get my $25 returned.

 

Gary