I don't wanna fill my taxes on TurboTax I want to stop and cancell the process.

[mohamednourboughalem20]

I have already filled my taxes so I want to cancell the process from the app.

[VolvoGirl]

You can just leave and abandon it.  If you haven't registered or paid or filed you can try to clear it
https://ttlc.intuit.com/community/using-turbotax/help/how-do-i-clear-and-start-over-in-turbotax-onli...