My Hard Drive Crashed, And I Lost My Tax Return For 2019

Last month, my hard drive failed and I lost all my files, including last year's tax return. I've tried looking for the hard copy that I printed out, but I can't find it. So now, I'm without the PDF or the hard copy, and I don't know what my AGI is.

 

I have my tax return from 2 years ago. Will that work? Or do I need the one for last year? Is it possible to ask for an extension when today is the last day for taxes? I'm nervous that I'm not going to get my taxes in on time.