Previous year's AGI amount for efile identification question

[manbeing]

This tax year (2019) will be my first year to use efile. I mailed the paper tax return for tax year 2018.

When being asked AGI number of 2018 to identify myself when doing efile this year,  should I enter 0 ? or the real AGI number of 2018?

[pet2020]

The real AGI should be what you use

[manbeing]

but I saw another post said "0" should be entered since paper return was filed last year.

Could anyone confirm it?

[LeonardS]

"...Yes, you can e-file if you are a first time filer unless there is another form or situation you have to report that is not supported via e-file. In the case of a first time filer, you can just use a 0 for AGI in place of an e-file pin..." Ref: TurboTax