@R349 The 1040SR is new starting in 2019. It is the same as the regular 1040 just larger type and the Standard Deduction chart is added to page 1. But has the same line numbers. You automatically get the SR if you or your spouse are 65. If you are using the Desktop program there is a way to force the one you want.
Compare them
1040SR https://www.irs.gov/pub/irs-pdf/f1040s.pdf
1040 https://www.irs.gov/pub/irs-pdf/f1040.pdf
1040/1040SR Instructions https://www.irs.gov/pub/irs-pdf/i1040gi.pdf
