I know for a fact that previous year tax returns can be e-filed for up to 3 years back.Tax professionals do it all the time.
TurboTax 2019 desktop version says e-filing is closed but still allows me to choose e-file and proceed. I stopped at the point where it asked me to pay for State e-file because I don't want to pay and then have it fail, nor do I want the Fed or State returns for 2019 rejected by IRS/State in case this is somehow wrong to do.
Can anyone tell me for SURE what will happen if I proceed? Why allow it if it can't happen? Why say it can't happen, if it can?
