Apple TV one-year subscription
How can I skip the free trial and sign up for Apple TV for one year for $50?
Apple TV (4th generation)
Not sure why you would want to skip the trial, but:
One way to do that would be to stop the subscription and resubscribe for 1 year.
If you stop the free trial it ends immediately and you can start the subscription again for 1 year
To stop a subscription follow the steps in this guide:
How to cancel a subscription from Apple - Apple Support
