Apple care for Apple Watch series 4

• There are two ways to determine whether you have coverage and, if so, when it expires. method one (Go to mysupport.apple.com and sign in with your Apple ID. Then tap or click your device. or or method two (Open the Apple Support app on your iPhone or iPad. At the top of the screen, tap your name or the sign-in button. Then tap Check Coverage).

-- JDee

Go here;

Check Your Service and Support Coverage - Apple Support