I am trying to finish my 2018 Taxes and it is asking me for me and my husband's pin or tax return from last year and I am sending my 2017 taxes by Fed-ex tomorrow. What?

[mesquitebean]

If you are just now filing your 2017 return, then there is no 2017 AGI currently for you in the IRS database.

So when efiling a 2018 return, you'd say your 2017 AGI is 0 (zero.)