To see the status of a family site, data or photo subscription, (including a free trial), log into your account, click on your name in the upper-right corner of the screen and select ‘My Purchases’.
Here you can check the status of your site, data and photo subscription, by selecting the relevant option as shown below highlighted in orange.
Want to learn more about the difference between family site subscription and data subscription? Read here: What’s the difference between a family site subscription and a data subscription?