my iphone X require connection to itunes,but it doesn't work, actually i forgot the password

If you forgot the Apple ID (iCloud) password, enter the Apple (iCloud) ID, and click Forgot Password. See if you can get a Rescue or Notification email option if necessary. Link to contact Apple Support at the end of the 2nd article.

Apple ID - Manage  -     

Apple ID – Forgot Password  *     

kopeek wrote:

I have Iphone x ,i forgot password and now require itunes connection however it is not working.

If you forgot your iPhone passcode - Apple Support