I cannot remember my answers to my Apple ID security questions

Note that if you use security questions then the account recovery service recommended in a previous article will NOT be available to you. That is only for two factor authentication users.

You can try the directions in this support article If you forgot the answers to your Apple ID security questions - Apple Support

but note that the article is labeled "archived" and may contain information that is out of date. This can also be because it is a feature Apple no longer supports.

If you cannot reset the security questions (e.g., “not enough information”) then realize that several years ago Apple transitioned to using to two factor authentication instead of security questions. Apple has since been persistently encouraging users to switch to the newer security system and your next recourse may be to try to change to two factor authentication as outlined in this article --> Two-factor authentication for Apple ID - Apple Support Follow the instructions in the section "Turn on two-factor authentication for your Apple ID"

If that does not work, contact Apple ID support at this link ➞ https://getsupport.apple.com/?caller=cups&PGF=PGF63005

Select "Other Apple ID Topics", then "Security concerns or account compromised." This will give you a chat or telephone call option.

You will have to use the Account Recovery process.

Have a look at this article:

How to use account recovery when you can’t reset your Apple ID password - Apple Support