Thank you @KathrynG3! With one slight change to your recommendation, it worked!
I am using TT desktop. I tried making a blank entry for 16c, then updating it to -0- during the check, but that did not work for me. Instead of entering a blank value for 16c, I had to enter a blank value in 16f. Then when I ran the check, I changed the value to from a blank value to a -0-. After that the check passed and I was able to submit my return.
Thanks,
Chris
