The TurboTax online editions are only for tax year 2019.
TurboTax does not support tax years prior to 2016. A tax return prior to 2016 that is filed for a tax refund will not receive the tax refund as it is beyond the three time limit for filing a tax return for a refund. If taxes are owed then the prior year tax return must be filed.
To complete and file a 2016 tax return using TurboTax you would need to purchase, download and install on a personal computer one of the 2016 desktop editions from this website - https://turbotax.intuit.com/personal-taxes/past-years-products/
A 2016 tax return can only be printed and mailed, it cannot be e-filed.
