The 2019 AGI you enter on the e-filed 2020 tax return is your electronic signature.
By entering your 2019 AGI to verify yourself. If you need a printed copy for someone then you sign it in ink.
i submitted my return on my computer. i finished. how do they verify that its me. i did not sign.
Was it Accepted? Then they verified you. You had to enter last years AGI for verification.
how can I make sure that I did? They have accepted the return, but Im a little worried. I've never filed like this before.
If this is your first time e-filing, it will feel strange to not have to sign the return. With e-file, it is an electronic signature that is backed with knowledge of your last years return. If your return was accepted, you are considered to have signed and filed.