"Enter a valid email address to use as your Apple ID"

Hello amrinder50,

We understand that you're having some trouble creating an Apple ID. The email that you use needs to be from a valid provider and not currently used by an Apple ID as a primary or recovery account, or one that was a prior Apple ID and later deleted. More details on creating an Apple ID can be found here:

How to create a new Apple ID

Thanks for using Apple Support Communities!