You can find your Store Account Name (Store ID) on the Store Account Information page.

1. Sign in to your My Services page.
2. Click the Store link.
   
3. Click Store Account Info in the Site Settings column.
   
4. You'll see your Store Account Name at the top of the page.
   

Additional Store Account Name information

• Your Store Account Name was automatically created and assigned to your store when you signed up. It begins with yhst- (for example, yhst-12345678910112).
• When you copy your Store Account Name to be used elsewhere, you must include the yhst- prefix.
• If you signed up for your Store v.1 prior to September 2003, you might have chosen a custom Store Account Name (like acmestore) at the time of signup.
• Your Store Account Name can't be renamed.