Can i file my 2016 taxes if i already filed my 2017 taxes or do i have to wait till next year ?

[cassairac]

How do i Mail it in ?

[DeniseF1 · Accepted solution]

No, you do not have to wait.  You can file 2016 now if you like; however, e-file for 2016 is closed and you will need to mail your return.

[cassairac]

How would i go about mailing it in ?

[xmasbaby0]

Online preparation and e-filing for 2016 is permanently closed.  You have to use desktop software to prepare a 2016 return.  You will be installing it to your own computer--so you will print it yourself and mail it.

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.