How to Apply for unlink wallet?

Can anyone help me with how to unlink wallet in brave rewards.

You go to Wallet unlinking request form

Also, make sure you’re aware that they are still intending to remove the device limit. You can see my Topic about that at Notice to all: device limit updates! Please read if having issues

what to write in Custodian member ID or Uphold member ID

THis link has some screenshots to help you properly fill out the information.