how can i see who is using my apple ID.?

Did you give out your Apple ID to other people? In the meantime, take a look here and contact support:

http://www.apple.com/support/appleid/security/

Nickys_Mommy0913 wrote:

How can i see what iphones are using my apple ID and how can i keep them from using it more.?

You can log in to https://icloud.com/find using your Apple ID. This will show all Apple devices that are using your Apple ID, as long as Find my iphone/iPad is enabled on the device. It will also show any Macs that are signed in to your Apple ID.

To stop others from using it change your password, and enable 2 factor authentication on your account.

@Nickys_Mommy0913

Please view the link below to assist you with your issue

Deauthorize your computer using iTunes - Apple Support

Sorry, but what does de-authorizing my own computer have to do with other people using my Apple ID with their devices? They could still purchase apps if they have my Apple ID and password.

If you sold an old iphone - and did not erase your data before doing a factory reset - person may have been able to retrieve your info (there is software to do that)

You can use some options below to check your setup - as there is a point where you authorize devices so you can de-authorize same.

BBC had cases of stolen id/password by thief filming (with smart device) a person signing in to their smart device then figuring out the sign-on and password from fingering.

wilkie.joissaint wrote:

@Nickys_Mommy0913

Please view the link below to assist you with your issue

Deauthorize your computer using iTunes - Apple Support

Stop posting misleading information. This is the second or third time today that you have done it. If you do not know the answer, do not post.