Why isnt it letting me add my new card number?

There is the tendency on the forum for contributors to sometimes repeat statements that are outdated or are not based on what Apple currently says in its documentation. Nowhere does Apple say that you have to have a payment method from the same country. All that Apple says in Change your Apple ID country or region - Apple Support about payment methods when changing country is: "Make sure that you have a payment method for your new country or region." It says "for", not "from". It then refers you to Payment methods that you can use with your Apple ID - Apple Support This may be to simply check if the payment method you used in your old country is also a payment type valid in your new country. Some payment types may be valid in one country but not in others. It does not say anything about your card having to be "from" the same country. This might just be poor wording on Apple's part in its documentation, but until they state clearly that the pay method must also be "from" the same country then I do not assume that it must be.

The only official statement I can find about international payment methods is what Apple says is in its support article: If your payment method is declined in the App Store or iTunes Store - Apple Support : "You might need to ask your financial institution to allow international purchases on your debit or credit card". If anything this is supporting the possible use of payment methods from other countries.

There could be many reasons for your card not working, but unfortunately you do not provide details such as what you are trying or any error messages you see. Check this resource about what to do if your payment method is declined in the App Store or iTunes Store. Click here --> If your payment method is declined in the App Store or iTunes Store - Apple Support

- Apple is checking with your financial institution if the payment method is valid and receiving a negative response. Make sure the name and address are entered exactly as it appears on your financial institution bills and that the 3 digit CVV is correct. Check with your financial institution about the status of your card.

- Make sure your payment method is up to date or to try a different one ( If you need to change or update your Apple ID payment method - Apple Support ).

- Make sure this is one of the payment methods that you can use with your account, as listed in this support article: Payment methods that you can use with your Apple ID - Apple Support .

・Unfortunately the payment methods list is somewhat general and does include individual brands of cards (I guess there are too many and are constantly changing).

・Also read any footnotes in the document.

・If you are trying to use a payment method from another country you may encounter problems. Apple nowhere states outright your payment method must come from the same country as that to which your ID is set, but some contributors to the forum (none of us work for Apple) say—without any substantiation on Apple's part—this is the case. In fact what Apple says about international payment methods is found in If your payment method is declined in the App Store or iTunes Store - Apple Support where it says: "You might need to ask your financial institution to allow international purchases on your debit or credit card". It could be there is some other unstated requirement that raises problems such as the billing address for the card must be in the same country as your account country even if the issuer is a foreign bank. Apple does not say but usually it is easiest to just use a card from the same country as your Apple Account setting.

・Finally, note that the document only says which methods _are_ acceptable. Apparently certain types (usually a credit or debit card) _must_ also be present under certain situations such as when a subscription is involved.

If you still have problems, contact official Apple Support. Click here --> Choose your country or region - Official Apple Support Select your country, then a product. If you don't see one that handles your issue then keep experimenting with selections until you reach one that gets you a chat session or a telephone call and get the representative to redirect you.

or:

See a list of Apple phone numbers around the world, in this article --> Contact Apple for support and service - Apple Support

If your payment method keeps getting declined in the App Store and iTunes you want to Contact - Official Apple Support to get further support on your issue. Make sure that the country settings in your App Store and apple account are the same as the country setting on the credit card are the same