I have premium account of linked In and it seems my subscription was purchased via the iTunes store. I want to upgrade my InMail credits it is asking me to go back to apple. Please guide the next step

Hello teddymitwa,

If you're unable to make in-app purchases through the LinkedIn app, we'd recommend taking a look at the following resource: If you can't find or use your in-app purchases. If you need to cancel the subscription, you'll need to follow the guidance provided in the Related Article linked above.

Additionally, we'd found this resource from LinkedIn directly that shares how to information on InMail credit: InMail message credits and renewal process

We hope this helps.

Thanks for using Apple Support Communities. Have a good one!