TurboTax does not support tax year 2017. You may be able to get the TurboTax software from a reputable vender such as Amazon. However, there is no guarantee that you will be able to get any updates or a state download with the 2017 software.
Note that if the 2017 tax return has a tax refund, the refund will not be paid since the filing is outside the 3 year window for filing for a 2017 tax refund.
If you have taxes owed with the 2017 return you need to seek out a local tax professional to assist you in completing the tax return.
