If your domain name is registered at GoDaddy and you want to transfer it to Hostinger, you can obtain the EPP code by contacting them or by following these steps:
Log in to your GoDaddy account
Select the domain you want to transfer to reach the Domain Settings page
Once you are there, select the Transfer domain away from GoDaddy option located in the Additional Settings section
Select Click here to see Authorization Code
After completing the steps above, you'll find the EPP code and be able to copy it. Additionally, you'll receive an email with the same information.
While you're in the Domain Settings section, disable domain privacy protection (if enabled), too.
Now, your domain is ready for transfer 😊
NOTE
If your domain name has special transfer requirements, or if you have any further questions, refer to this article: Get the auth code for my domain | Domains – GoDaddy Help