After you file


@Chad Keller wrote:

This is for a 2018 tax return that never got filed. I'm not worried about refund since I'm not getting one since I had to pay additional taxes. I just need it filed.


For a mailed tax return the IRS usually processes the return within 6 weeks after the return is mailed.

If you owe taxes on the 2018 return you can pay those taxes on the IRS payment website using Direct Pay - https://www.irs.gov/payments