Update the VAT ID and Domain Verification - Cambodia

Hi Community Support Team, I have been trying to get assistance from OpenAI Support for the past week regarding updating our VAT ID and completing domain verification for SSO integration with our ChatGPT Business workspace. However, I have not yet received the required support. Before subscribing, I contacted the OpenAI Support team to ask how to update the VAT ID, as there was no available field to enter it during the subscription process. I was advised that the option would be available under the Billing tab after subscription. Unfortunately, after subscribing, the VAT ID field did not appear. I checked again yesterday, and now I am unable to see the Billing tab as well. I would appreciate your assistance with the following: 1. Updating our VAT ID in the ChatGPT Business workspace. 2. Supporting the domain verification process for SSO integration. 3. Reissuing or regenerating the invoice, as the current invoice was generated without the VAT ID. Your prompt support on this matter would be highly appreciated. Thank you. Best regards, Nuwan Perera