Adding my card to my wallet

Make sure your payment method is accepted by Apple in your country or region.

Payment methods that you can use with your Apple ID - Apple Support

Make sure your regions are set correctly.

Confirm your region is set correctly.

Change the language and region on iPhone - Apple Support

Change your Apple ID country or region

It’s possible your card type can’t be used. Is it a debit card, credit card, prepaid debit card?

Lastly, add a different payment method or contact Apple Support in your country or region.

Add a payment method to your Apple ID - Apple Support

Choose your country or region - Official Apple Support

That’s not your Wallet App. You’re adding a payment method to your Apple ID account for use with Apple App Store and iTunes. Is that what you’re wanting to do?

Are you trying to add your card (payment method) to your Apple Wallet or what exactly? Do you receive an error message? If so, exactly what does it say?