How do I skip the upgrade? I want to file for free. It is trying to make me upgrade. It doesn't list any other options.

If you have not yet filed : 

How to see your fees
https://ttlc.intuit.com/questions/2565973-how-do-i-review-my-fees-in-turbotax-online   

For help with fees 
https://ttlc.intuit.com/questions/1901213-what-can-i-do-to-reduce-my-fees   

How to remove the Pay from your Refund fee 
https://ttlc.intuit.com/questions/1900517-how-do-i-remove-refund-processing-fees-in-turbotax-online-and-change-my-payment-method 

How do I remove TurboTax Live?

https://ttlc.intuit.com/community/downgrading/help/how-do-i-remove-turbotax-live/00/27312

Or use one of the IRS FREE FILE options if you qualify...

https://apps.irs.gov/app/freeFile/