If you are 65 or older you will be using a 1040SR, which is identical to a Form 1040 except for the larger print. If you decide to print the return out for yourself it will print on a 1040SR. All of the lines and all of the calculations on 1040 and 1040SR are exactly the same.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**