TurboTax does not support tax year 2018.
If you are filing the 2018 for a tax refund, the refund will not be paid. It is beyond the three year from the due date of the 2018 tax return required for a tax refund.
If you have taxes owed on the 2018 return or just need to get it filed for other reasons you should seek out a tax professional to assist you in completing the tax return.
