I subscribed already on chegg but it not access yet and told me you must subscribe to post a question??

Hello shahed129,

Thank you for participating in the Apple Support Communities! We understand that you do not have access to features included with an app subscription. We'd be happy to help point you towards a resolution.

Let's start by forcing the app to close, then checking if you have access to the features when you reopen it:

How to force an app to close on your iPhone, iPad, or iPod touch

If there's no change, we suggest contacting the app developer to confirm if there's additional steps to take, and what's included with the subscription:

How to contact an app developer

Take care.

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