How do I change my date of birth in adobe account for using some AI features

You mean you want to set the DOB wrong, to get past the checks, or you want to connect an earlier error?

Robert, please see https://community.adobe.com/t5/account-payment-plan-discussions/how-do-you-change-your-date-of-birth-in-profile/m-p/13813914 where this topic was just discussed. If the college manages your son's account, then he will need to work with them to update the account.

https://helpx.adobe.com/creative-cloud/kb/you-eligible-cc.html#:~:text=Update%20your%20Adobe%20ID.%20Your%20Adobe%20ID%20wasn%27t,your%20date%20of%20birth%20when%20prompted.%20Click%20Update.