No, if you mail in your tax return, you don't have to provide your prior year AGI at all.
The reason is that the prior year AGI is a substitute for a pen and ink signature.
As long as you sign the mailed in return, there's no question of acceptance.
It seems likely that the IRS will accept $0 as the prior year AGI for someone with a new Social Security number (SSN), because no return was filed with that SSN in 2022.
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