If you have not already paid for Deluxe or registered the free version, you can use the clear & start over feature to downgrade. It will remove all information you have already entered. 

You can find the steps to do that at this link How do I clear and start over in TurboTax Online?

Can I switch to a lower-priced version of TurboTax Online?

https://ttlc.intuit.com/replies/3288495