I want to remove my child from my Apple Cash account. How do I do that?

Hello!

If you are wanting to remove the account on a device you can do the following:

• On iPhone or iPad, open the Settings app, tap Wallet & Apple Pay, then turn off Apple Cash.
• For Apple Watch, open the Apple Watch app on your iPhone, tap Wallet & Apple Pay, then turn off Apple Cash.

You can find more information here:

Close your Apple Cash account or turn it off on a device - Apple Support

Cheers!