Did you move recently? Do you need to change country of your iTunes account?
In iTunes Store, there is an option available under the Account page where you can change country or region anytime. The service is absolutely free, however you must have a valid source of funds, for example, credit card, and a billing address in the country which the account will be transferred. Without a valid billing source, you will not be able to change region. iTunes Store usually accepts PayPal, gift certificates, iTunes cards, and credit card payments. In other countries, there are other payment options such as ClickandBuy and PayEase.