Why does it want you to upgrade? Also if you do upgrade to Deluxe, state will be another 44.99.
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
See the new IRS Schedules 1 thru 6
https://www.irs.gov/pub/irs-pdf/f1040s1.pdf
https://www.irs.gov/pub/irs-pdf/f1040s2.pdf
https://www.irs.gov/pub/irs-pdf/f1040s3.pdf
https://www.irs.gov/pub/irs-pdf/f1040s4.pdf
https://www.irs.gov/pub/irs-pdf/f1040s5.pdf
https://www.irs.gov/pub/irs-pdf/f1040s6.pdf