Please follow these steps:
1. Open the Settings app.
2. Tap your name, then tap Subscriptions
3. Select the subscription to see the details.
Also, here you can find more detailed instructions, provided by Apple.
If you can’t see your subscription, make sure you’re signed in with the same Apple ID you used to purchase it.
If you bought your subscription on our website, please follow these instructions instead. You can also contact our support team via the Contact Us form—we’ll be happy to help.