How do I reset my Apple ID to set my watch to iPhone

Hi Mary-apple,

Welcome to the Apple Community, where some of us do our next to help each other.

Your Apple ID is the account you use to sign in to all Apple services,

such as App Store, iTunes, iMessage, iCloud, FaceTime, Apple TV, and more

.

Your Apple ID sign-in (username) is most often an e-mail address.

If you forgot your Apple ID you can look it up from the first link below.

or

check if you're already signed in to an app or service.

Re: Apple ID

Having trouble signing in?

https://iforgot.apple.com/password/verify/appleid

Hope that works for you :)

If not:

if you have forgotten the appleID itself :

https://support.apple.com/en-gb/HT201354

if you have forgotten the appleID password:

https://support.apple.com/en-au/HT204316

Two-factor authentication for Apple ID

https://https://support.apple.com/en-au/apple-id

If you’ve forgotten the answers to your Apple ID security questions

https://support.apple.com/en-au/HT201485

And: 

If you make changes to your Apple ID: 

What to do after you change your Apple ID or password:

https://support.apple.com/en-au/HT204071

Or

For more help:

Apple ID Support Page:

https://support.apple.com/en-au/apple-id

Hope one or more of these articles help you :)