Why is it not letting me use my apple gift card

Hi insanemoon1585,

Welcome to the Apple Community, where some of us do our best to help each other.

All Apple Gift Cards are not the same, so wondering which one you have.

Apple have a page that will identify which card it is, and how it can be used.

To find out which one you have, and what you can do with it:.

https://support.apple.com/en-au/HT204199

Your Apple ID is your account used for iTunes, Music, iMessage, and everything Apple

Payment methods that you can use with your Apple ID

https://support.apple.com/en-au/HT202631#methods

(Scroll down to see the various countries listed)

If your card works with your Apple ID in your country:

What you can buy with your Apple ID balance

https://support.apple.com/en-au/HT211187

How to : Change, Add or Remove Apple ID Payment methods

https://support.apple.com/en-us/HT201266

Apple ID Log-in:

https://appleid.apple.com/

Hope this helps you enjoy using your gift card :)