Can I downgrade from my deluxe on my phone? Or does it have to be on a computer. If I can on my phone, how?
No, you cannot downgrade from Deluxe on your phone. To downgrade, you will have to "Clear and Start Over". To do so, follow the directions in this FAQ:
You have clicked a link to a site outside of the TurboTax Community. By clicking "Continue", you will leave the Community and be taken to that site instead.