I am a college student that earned cash from nannying. Can I use the free version? I Did not receive a 1099-MISC?

If you got paid cash and they didn't take taxes out that is self employment income and you need to file it on Schedule C.

There are 2 different Free versions.  Turbo Tax Free Edition and the IRS Free File website.  If you don't qualify for the Free Edition  you might qualify for the Free File website.

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.

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

AGI $36,000 or less.

Active duty military with AGI of $69,000 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 Sign in at the top right.  It may let you continue your return so you don't have to start over.

https://freefile.intuit.com/

How to switch to the Free File website

https://ttlc.intuit.com/community/downgrading/help/how-do-i-switch-to-turbotax-free-file-program/01/26264