Click on the Profile icon in the top right and select "View Taxpayer Profile".
Copy the Registration number to an external file, then scroll down to the bottom of the page, and go to "Representatives".
Click on the "ERP" tab, then click on the "+ Register ERP" button.
Add "Credify" as the ERP Name, select "3 years" as the client secret expiration, and click "Register".
Copy and Paste the Client ID, Client Secret 1, and Client Secret 2 to an external file, mark the Checkbox, and then select Done.
In the Credify Connection Page, add your Tax Registration Number saved in step 3, and the Client ID and either Client Secret saved in step 6 under Registration Number, Client Key, and Client Secret respectively.