I am trying to clear and start over but is says it can't because i have already registered the tax return. i have not paid for any service and i have not not filed yet?

If you haven't paid yet you you could just leave this account and start a new account.  Online is only good for 1 return.  But you can use the same email address for 5 accounts.   How to start another return in the Online version

https://ttlc.intuit.com/community/using-turbotax/help/how-do-i-start-another-return-in-turbotax-online/00/25596

Are you trying to go back to the Free Edition?  In the regular Turbo Tax Free Edition, information that you can enter is limited now.  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.

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