Find out who can give me billing information access

To resolve your issue and gain access to billing information, you'll need to identify and access the root user account. The root user is the only account that can initially grant billing access to other users. Here's what you need to know:

1. The root user account is associated with the email address used to create the AWS account. This is typically the email address that receives AWS billing notifications and other important account information.

2. If you're not sure which email is associated with the root account, you might need to check through the email accounts you have access to for any AWS-related communications, especially those related to billing or account creation.

3. Once you've identified the root user email, you'll need to sign in to the AWS Management Console using those credentials (email and password).

4. After signing in as the root user, you can enable IAM user access to billing information. This is done by:

   • Going to the account name in the navigation bar and selecting "Account"
   • Scrolling down to the "IAM User and Role Access to Billing Information" section
   • Selecting "Edit" and then activating IAM access

5. After enabling IAM access to billing, you can then grant yourself (as an IAM user) the necessary permissions to view and modify billing information.

If you're unable to locate or access the root user account, you may need to contact AWS Support for further assistance. They can help verify your identity and potentially help you regain access to the account.

Remember, it's crucial to secure the root user account once you've gained access, preferably by enabling multi-factor authentication (MFA) and creating separate IAM users for day-to-day account management.
Sources
Setting up your AWS account - AWS Identity and Access Management
Access denied even though ive set permissions | AWS re:Post
Access Denied to almost everything in AWS | AWS re:Post

Identifying the root user is tricky. Since you inherited this account, your email is most likely not the root user. What you can do, is add this AWS account under an AWS Organisation (temporarily if needed). Once added, go to AWS Organisation in your main account where AWS Organisation is configured. It will tell you the root user email addresses there.