Can I efile 2018 when I have not mailed in 2017 taxes. I was late filing because of an illness

[TomK]

https://ttlc.intuit.com/replies/4186200

[zjean1018]

I have 2017 prepared just not mailed in yet. Is the AGI on the 2017 1040? Or would it be best just to print and mail both?

[TomK]

Yes, the AGI is on 2017 tax return... and Yes, mailing both may be better (you can try e-filing 2018, but it may get rejected>