My step daughter just turned 18 last December. I am trying to finalize her return and it is asking for her AGI which would be on last years return. This is the first year filing on her own. What would

[VolvoGirl]

If she did not file her own 2018 return then her AGI is 0.  Enter zero.

[xmasbaby0]

If your child did not file a 2018 return then her 2018 AGI is zero.  If zero will not let you e-file it, then it has to be printed, signed and mailed.

When you mail a tax return, you need to attach any documents showing tax withheld, such as your W-2’s or any 1099’s.  Use a mailing service that will track it, such as UPS or certified mail so you will know the IRS/state received the return.