AGI in 2019 on paper return lost in backlog not recognized

https://ttlc.intuit.com/community/agi/help/how-do-i-find-last-year-s-agi/00/25947

 

So I filled it properly the first time per my TT from 2019. But my 2019 is not available to IRS yet because of a mass of paper returns in the backlog.  Next advice per the link above was to put ZERO.  I did. Still REJECTED.  

 

I am in the UK.   I have a US bank, no problem there.  So how can I get the efile to go through?  I never owe tax or pay tax, I always zero out as we are MJF with SocSec and a small pension.  So I am only trying to get the 2nd stimulus check via a refund which TT shows I am entitled to.

 

Can I not efile for this?  Do I have to send paper returns AGAIN ???