After you file

DoninGA  Why are you so insistent that 2020 amendment feature is available 3/26 when it is not, at least for some TT users? Below is a screenshot from 4/2/2021. Tried deleting cookies, using a different browser. I need to amend Form 8949 as my 1099-B was missing cost base (sold employee shares). Looks like I'm stuck indefinitely until TurboTax clarifies what's going on.