It could take 13 to 16 weeks to process a paper 2019 tax return. I filed my 2019 late on Dec 15 2020, and as of today(3/19/2021) 13 weeks have passed and it still has not been processed. Regarding 2021 stimulus, best to file 2020 taxes early to get into stimulus que by efile. For 2019 AGI use 0 for unprocessed 2019 paper return.
