I need 2019 AGI to e-file 2020 Tax, but IRS says no records found for my 2019 tax return. I filed 2019 tax in mail and they have deposited my check. What should I do?

I have received my tax records from IRS for 2017,2018, but no record for 2019. I have never e-filed before.  this is my first year I want to try e-file.