Hello,
It seems like you are asking where to input a code in order to update your payment details on Adsterra. To update your payment information on Adsterra, you need to follow these steps:
1. Log in to your Adsterra account.
2. Navigate to the "Account" section or "Profile" tab.
3. Look for the payment details section, which may be labeled as "Payment Information" or something similar.
4. Locate the text field where you can input your payment code or update your payment details.
5. Enter the provided string code "ff47___4" into the text field.
6. Save or submit the changes to update your payment information.
Please note that the exact steps and labels may vary slightly depending on the Adsterra interface and updates made to the platform. If you encounter any difficulties or have further questions, I recommend reaching out to Adsterra's support team for assistance.
PH