TurboTax does not support tax year 2018. If you are filing the 2018 return for a tax refund it will not be paid as it is beyond the 3 year limit for filing from the due date of the tax return.
If you have taxes owed on the 2018 return it needs to be paid as soon as possible since penalties and interest will continue to accrue until the tax return is filed and the taxes are paid. The IRS will mail you a bill for the penalties and interest.
You should seek out a local tax professional to assist you in the completing the 2018 tax return if taxes are owed.
