On your Roku TV go to Settings/System/About and note the email address shown near the top which identifies your Roku account.
Now in a web browser on your computer or mobile device log into your account at https://my.roku.com using that same email address. You can set or update the PIN for your Roku account there.
While in that section you can also specify when the PIN will be required. I would suggest at least requiring the PIN when making any purchases.
Roku Community Streaming Expert
I am not a Roku employee, only a user like you. Please, no support questions via private message -- post them publicly to the Community where others may benefit as well.
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Ultra 4800 | Streaming Stick 4K+ 3821 | TCL Roku TV 43S245/C107X
