I need to change my apple ID to my other email address. I must have used it in the past, but I cannot remember my password. When I try to change it, it tells me that that address is already taken. It is by me!
MacBook Air 13″, macOS 12.5
Then you cannot change the Apple ID to the other address.
You will need to regain access.
The following articles describe various aspects of recovering access to an Apple ID:
If you forgot your Apple ID password - Apple Support
If you forgot your Apple ID - Apple Support
How to use account recovery when you can’t reset your Apple ID password - Apple Support
Contact Apple for help with Apple ID account security - Apple Support
Then you cannot change the Apple ID to the other address.
You will need to regain access.
The following articles describe various aspects of recovering access to an Apple ID:
If you forgot your Apple ID password - Apple Support
If you forgot your Apple ID - Apple Support
How to use account recovery when you can’t reset your Apple ID password - Apple Support
Contact Apple for help with Apple ID account security - Apple Support
EG Apple ID and password
