Get your taxes done using TurboTax

It really doesn't matter.  And if you efile only the data gets sent, not the form it's on.  Is it when you preview it on the screen? 

When you print it will print on the 1040SR even if you see only the 1040 on the screen.  You automatically get the 1040SR if you or your spouse is 65 or older.  In the Desktop program you can tell it which one to print.