Did the IRS cash the check you say you mailed? That would be your only proof that you paid.
Do you still have your emails from last year?
When you e-file your federal return you will receive two emails from TurboTax. The first one will say that your return was submitted. The second email will tell you if your federal return was accepted or rejected. If you e-filed a state return, there will be a third email to tell you if the state accepted or rejected your state return.
And....I am also on a Mac. I can open up a 2018 return and click e-file status and see if a return was accepted. Did you try that?
**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.**
