my year is incorrect

maybe be more careful typing things next time?

Create a New Apple Cash Account (Preferred):

This might be the simplest solution, especially if you haven't added any funds to the existing account. You can create a new Apple Cash account with the correct birth year by following these steps:

Open the Wallet app on your iPhone.

Tap the Apple Cash card.

Tap the menu button (three dots).

Select "Remove Apple Cash."

Now you can go through the setup process again, entering the correct birth year this time.

Contact Apple Support (If Needed):

Visit the Apple Support website: Official Apple Support

Apple Cash is a service that’s administered by Green Dot Bank. Contact an Apple Cash Specialist at Green Dot Bank by calling (877)-233-8552 or by calling 1-800-MY-APPLE

https://applecash.greendot.com/termsconditions/