How can I change the currency when I changing my gamertag second time?

Can you give some more information? Are you trying to change the tag on the website?

For more information on switching your gamertag. Take a look over the
How to change your gamertag link.

"If your gamertag was created for you when you initially signed up for Xbox (meaning you did not choose it yourself), you can change it one time for free. Additional Xbox gamertag changes cost extra.
If you created your own gamertag at signup and want to change it, you will be charged (fee varies by region and currency)."

Hi ZB,

If your gamertag was created for you when you initially signed up for Xbox (meaning you did NOT choose it yourself), you can change it one time for free.

If you created your own gamertag at signup and want to change it, you will be charged (fee varies by region and currency).

Check out:
How to change your Xbox Gamertag.

Best Wishes

Okay! Thank you so much for the help! )

so i change it on the console and when i try to change it again it says “something is wrong try again.” So i am trying on the computer and when I go and type the new gamertag and change it, it leaves me on the same page. It shows no where to pay and no directions to paying like you said.