Can I clear all data

[xmasbaby0]

If you have not registered, paid or e-filed you can clear and start over 

CLEAR AND START OVER

https://ttlc.intuit.com/questions/2586254-how-do-i-clear-and-start-over

[LeticiaF1]

As xmasbaby0 mentioned, if your return has not already been filed, you can delete or cancel your return.  To do this:

1. Log into your return
2. On the left side menu, find and select Tax Tools
3. Click on Clear & Start Over

This should clear all the information that you have entered and cancel the return.  

@raye6822