If you or your spouse are 65 or older, your return will print out on a Form 1040SR. Form 1040 and 1040SR are identical. The only difference is that 1040SR has bigger print and uses three pages instead of two pages. The lines and calculations are identical. It makes no difference whatsoever to your refund or tax due whether you use 1040 or 1040SR. When you begin to enter data into TurboTax you are preparing your 1040SR.