Thank you for your inquiry. The IAT/ICA number is not directly related to the Visa Developer Portal, therefore, I will not be able to comment directly on how you will get the IAT/ICA number. Please contact your payee for the significance of IAT/ICA.
If you would like further assistance, please email firstname.lastname@example.org and someone will find a representative that will help you with your inquiry.
Was your question answered? Don't forget to click on "Accept as Solution" to help other devs find the answer to the same question.