I want to change my country on itunues and i tryed, they want me to fill credit card information but i don't have a credit card, what can i do?

Changing country on an account is likely to require payment details : Why can’t I select None when I edit my Apple ID payment information? - Apple Support

When you change the country or region of an existing Apple ID, you must provide a payment method and update your billing options. If you want to remove your payment method after you change the country or region, you can change your payment information to None.

If you don't have payment details for the county where you now are (you have to be in a country to use its store), you could try contacting iTunes Support and see if they can help you bypass the requirement