Any tax information (income, deductions, etc.) must be filed in for the tax year it corresponds to.
Example: You cannot report 2016 W-2 income on your 2017 tax return.
You would have to file a separate prior year return if you have not already.
If you have, you would have to amend that year with the new information.
To file a prior year:
TurboTax Online is closed for filing prior years.
In order to prepare prior year tax returns, you need the respective TurboTax Desktop (Download/CD) for each year you are preparing.
Please see the following (TurboTax Desktop software is available for each of the three prior tax years (2014, 2015, 2016)):
To amend a prior year:
Please see the following and click on the year in question:
