Hello , when I went to netfile I got the same error message no code about boxes 52-53 not totaling box 21 I corrected the error and was able to netfile. May 8th I received 4 more t3s and had to refile but again the same error message and to either print and mail or file later. I checked all the math a dozen times and also tried all suggested fixes, nothing works, I even deleted the t3s with amounts in boxes 21, 52, 53 and restarted the computer, still error message. This has to be a software issue . This is very stressful and printing and mailing is really not an option with the looming postal strike May 22.
Ric
