Why if one corrects the $300/$600 error that shows up during the "Analysis" does it show up again if one needs to correct any information in the income or deductions section, how many times does one need to make the $300/$600 manual correction? This to me indicates a software problem.
In addition, the 1040SR form once printed (pdf form) does not reflect the addition of 12a and 12b in 12c, it is blank instead of adding 12a + 12b, again an indication that there is something amiss with the software programming related to the Charitable Deduction contribution amount. The regular 1040 form that can be previewed within the TT program shows the 12c filled, but there is never an opportunity to preview the 1040SR before printing the pdf that shows 12c blank. There is currently Investigation # 16696 with TT related to this problem.