In the regular Turbo Tax Free Edition, information that you can enter is limited now.  Under the new tax laws, there are no more simple Form 1040EZ or 1040A's.  Everything goes on a little Form 1040 that has six extra "schedules" with it, and if you need any of those schedules, you are not able to use the Free Edition.  

https://www.irs.gov/forms-pubs/about-form-1040 

Why do I have to upgrade from the Free Edition?

https://ttlc.intuit.com/community/upgrading/help/why-do-i-have-to-upgrade-from-free-edition/00/26379

OR There is also The Turbo Tax Free File program which is free for federal and state.  And has more forms than the Federal Free Edition, like Schedules A, B, C , D, E, F, EIC, H, K-1, SE,  etc.

NOTE:  You will have to log out of your regular Turbo Tax Account and setup a new account with a new username and new password or it will take you back to regular Turbo Tax.

To qualify for the Free File website  you just need to meet one of these 3 things

AGI $34,000 or less

Active duty military with AGI of $66,000 or less

OR qualify for EIC (earned income credit.)

In order to use the Free File program, you have to start it at a special website.  Click on the bottom Orange button I Qualify Start Now and set up a NEW account

http://turbotax.intuit.com/taxfreedom/

IRS Free File Program - https://apps.irs.gov/app/freeFile/
If you are eligible you can use the TurboTax Free File Program which is free to file both a federal and state tax return. The Free File Program edition is a full featured personal tax program and on a separate website from the TurboTax online editions.

To qualify for free 2018 federal and state tax returns with the Free File Program, you'll need to meet at least one of these requirements:

• A maximum 2018 adjusted gross income (AGI) of $34,000; or
• You qualify for the Earned Income Tax Credit (EITC); or
• You served as active duty military (including Reservists and National Guard) with a maximum 2018 AGI of $66,000 (you'll also need a military-issued W-2).

See this TurboTax support FAQ on the Free File Program - https://ttlc.intuit.com/questions/1900583-what-is-the-turbotax-free-file-program

See this TurboTax support FAQ for the difference between the Free File Progam and the Free edition - https://ttlc.intuit.com/questions/2572617-what-s-the-difference-between-free-file-program-and-free-e...

And see this TurboTax support FAQ on how to switch to the TurboTax Free File Program - https://ttlc.intuit.com/questions/2026912-how-do-i-switch-to-turbotax-free-file-program