Yesterday I may have inadvertently e-filed another hypothetical tax return. If so, how do stop the hypothetical return e-filing?

 

After you file

Impossible.  You could not have e-filed a return yesterday on November 6, 2019.  E-filing has been permanently closed for 2018 returns since end of day on October 20, 2019.  So breathe easy.  You did not file anything.

**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.**

After you file

I can tell you with 100% confidence   that you could NOT have efiled ANY tax return yesterday since the efile system closed 10/20/19.