No, the government does not allow you to combine Tax Years. Your 2016 W-2 must be filed on your 2016 return. If you
have already filed that return you would need to amend. If you have not yet
filed a 2016 return please use our prior year products to complete that return which will need to be mailed. If you have already paid for your 2016 fees please contact customer service. Only the current tax year can be filed online. https://turbotax.intuit.com/personal-taxes/past-years-products/
https://ttlc.intuit.com/replies/3288565
