Now I feel old

I am 66 years old. TT apparently decided to file Form 1040-SR. Sigh.

 

I thought the only real difference was larger type on the SR. Why would that matter for TurboTax? I'm going to e-file.

 

When I go into Forms Mode, I see Form 1040. Only when I print to PDF do I see 1040-SR. Why the discrepancy?