Sorry, but you cannot complete a 2018 tax return using the Freedom edition any longer. Nor can you use the 2019 Freedom edition to complete the 2018 tax return. The 2019 Freedom edition can only be used to compete a 2019 tax return and should be available in mid January 2020.
At this time your only option using TurboTax to complete a 2018 tax return is to use the 2018 desktop editions. You would need to purchase, download and install on personal computer, Win or Mac, one the 2018 desktop editions from this website - https://turbotax.intuit.com/personal-taxes/past-years-products/
The 2018 tax return can only be printed and mailed, it cannot be e-filed.
Your other option, if you want to complete a 2018 federal tax return at no charge, is to get the forms, schedules and instructions for free from this IRS website - https://apps.irs.gov/app/picklist/list/priorFormPublication.html
