How do i file for the first time home buyers tax credit after i filed my taxes already?

I filed my taxes back in february and bought a house on April 15th, im not sure what forms i need to file to get the tax credit this year. Any help would be great.

What is a VPN?

VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia��).