2016 and 2017 need to be done and im abroad

It may be easier/cheaper   to just get the forms & instructions from the IRS and fill them in manually since prior year returns need to be mailed in .... but if you want to use the program ...

How do I finish a prior-year return that I started in TurboTax Online?

If you started your 2015, 2016, or 2017 return in TurboTax Online but didn't finish it before the shutdown, you can always start over in the TurboTax CD/download software, available for purchase at TurboTax.com.

You can also transfer your incomplete return to the CD/download software if you don't want to start from scratch. Here's how:

1. Purchase the TurboTax CD/Download software and install it on your PC or Mac computer.

o    If you're also doing a state return, be sure to download and install the corresponding state program on your PC or Mac.

1. Now sign in at TurboTax.com with the same login you used to prepare your prior-year return.
2. Under Your tax returns & documents, select Download .tax file(not the PDF) for the prior year you want and save it to your computer.
3. Back in the CD/download software, select Find a Tax File, and then browse to the tax data file you downloaded in Step 3. Select the file and click Open.
4. You can now finish up in the software. You'll need to paper-file, as e-filing for prior years is no longer available.

Related Information:                 

• How do I get a copy of a return I filed this year in TurboTax Online?
• What's the difference between the tax data file and the PDF file?
• Can I convert my PDF into a tax data file, or vice-versa?

You'll need to explain whether you are a US citizen or not.....or whether you worked in the USA as a non-citizen, but with an ITIN (or not) and visa status.  Some non-citizen statuses can't use turbotax.

IF you were/are  a US Citizen, then you would need to use the desktop software that is installed on a full MAC or Windows computer, and they would have to be filed by you on paper thru the mail, since only 2018 tax files can be e-filed right now.

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If you have a USA bank credit card with a USA billing address, you can buy a download for each year here:

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

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If you do not have a USA Creditcard/billing address, you may need to get a family member or friend in the USA to send you a purchased TurboTax CD to install on your computer (Make sure you have a CD/DVD reader)...and even then, the software from the CD will require a full set of software updates after the initial installation (The CD copies tend to be very early/incomplete versions)