Here are some fast answers for you Can I file a 2017 return if I haven't filed my 2016 return yet? I need last years AIG to file my 2016 taxes?

[ilovetopfueltoo]

I need to file my 2016 taxes to prove my 2016 AGI on this years 2017 tax form. IRS is rejecting my 2017 taxes because of the AGI.

[xmasbaby0 · Accepted solution]

Use "zero" for your 2016 AGI to e-file your 2017 tax return.  If zero does network, then you will have to print, sign and mail your 2017 return instead of e-filing.

Meanwhile, to file your 2016 return:

To file a return for a prior tax year

Only a 2017 return can be prepared online and e-filed. 

 If you need to prepare a return for 2014, 2015, or 2016 you can purchase and download desktop software to do it, then print, sign,  and mail the return(s)

https://turbotax.intuit.com/personal-taxes/past-years-products/

Remember to prepare your state return as well—if you live in a state that has a state income tax.

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 received the return.