Yes, you can start over. However, it is best
to use one account only. This will ensure you are able to access prior returns
and that your information is transferred over into your new return. Use the
account you filed with last year (If you used Turbo Tax). Now, if this is the
account you are using, you can start that return over. If it is rejected again,
you can fix it the error and continue to file.
This FAQ
will show you how to fix a rejected return. https://ttlc.intuit.com/replies/3302275
This article will provide information on Clearing & Starting Over after
you've registered.
https://ttlc.intuit.com/replies/5647695