Go to https://privacy.apple.com/
Sign in with the Apple ID you want to delete
Select Request to delete your account
Choose a reason for deletion
Review the account deletion details
Select Continue
Read and accept the terms and conditions
Choose how you want to receive account status updates
Save the access code provided by Apple
Confirm the deletion request
Wait for Apple to process the deletion request
Sign out of all Apple devices and services linked to the Apple ID
Remove the Apple ID from iPhone, iPad, Mac, Apple Watch, and Apple TV if needed
Back up any important data before deleting the account
Cancel any active subscriptions tied to the Apple ID before deletion
Redeem or use any remaining Apple Store credit before deletion