How to claim my 3 month free Apple TV subscription?

Read here how to redeem: Apple TV+ offer - Apple

For the terms and conditions: see Jim’s link.

Read here if you have trouble redeeming: If you can't redeem your promotion for an Apple subscription - Apple Support

↳ Step 5 says to contact Apple if the prior steps didn’t bring a solution. They can assist.

Those offers usually only apply to new customers, so if you have ever had a subscription to Apple TV+ before, you will not be eligible for the offer. Information about the typical offer is here:

https://www.apple.com/promo/pdf/EN_US_ATV+_Promo_TandCs.pdf