[Improvement]: Add instruction on how to add a billing manager on the…

… new billing platform (#53986)

Co-authored-by: Kevin Heis <heiskr@users.noreply.github.com>

content/billing/using-the-new-billing-platform/roles-for-the-new-billing-platform.md

@@ -51,3 +51,19 @@ You can:
 * Download CSV usage reports.
 
 {% endif %}
+
+## Inviting a billing manager
+
+The invited person will receive an invitation email asking them to become a billing manager for your {% ifversion ghec %}enterprise{% endif %}{% ifversion fpt %} organization{% endif %}. Once the invited person clicks the accept link in their invitation email, they will automatically be added to the {% ifversion ghec %}enterprise{% endif %}{% ifversion fpt %} organization{% endif %} as a billing manager. If they don't already have a {% data variables.product.prodname_dotcom %} account, they will be directed to sign up for one, and they will be automatically added to the {% ifversion ghec %}enterprise{% endif %}{% ifversion fpt %} organization{% endif %} as a billing manager after they create an account.
+
+{% data reusables.user-settings.access_settings %}
+1. In the "Access" section of the sidebar, click **{% octicon "organization" aria-hidden="true" %} Organizations**.
+{% data reusables.profile.org_settings %}
+1. If you are an organization owner, in the "Access" section of the sidebar, click **{% octicon "credit-card" aria-hidden="true" %} Billing and plans**.
+1. Click the link in the text box, **Enterprise account billing settings**, which will direct you to your organizations billing settings page.
+1. On the left side of the page, in the enterprise account sidebar, click **{% octicon "person" aria-hidden="true" %} People**.
+1. Under "People", click **Administrators**.
+1. Above the list of administrators, click **Invite admin**.
+1. Type the username, full name, or email address of the person you want to invite, then select the appropriate person from the results.
+1. Select **Billing Manager**.
+1. Click **Send Invitation**.

content/organizations/managing-peoples-access-to-your-organization-with-roles/adding-a-billing-manager-to-your-organization.md

@@ -46,14 +46,21 @@ Billing managers **are not** able to:
 
 ## Inviting a billing manager
 
+{% ifversion enhanced-billing-platform %}
+
+>[!NOTE] Enterprise accounts, and organizations owned by enterprise accounts, created after June 2, 2024, have access to the enhanced billing platform. Enterprises that participated in the {% data variables.release-phases.public_preview %} program also have access to the enhanced billing platform.
+>
+> If you are on the enhanced billing platform, the process for adding a billing manager is different. See [AUTOTITLE](/billing/using-the-new-billing-platform/roles-for-the-new-billing-platform#inviting-a-billing-manager).
+
+{% endif %}
+
 {% ifversion ghec %}
 
-> [!NOTE]
-> If your organization is owned by an enterprise account, you cannot invite billing managers at the organization level. For more information, see [AUTOTITLE](/admin/overview/about-enterprise-accounts).
+If your organization is owned by an enterprise account, you cannot invite billing managers at the organization level. For more information, see [AUTOTITLE](/admin/overview/about-enterprise-accounts).
 
 {% endif %}
 
-The invited person will receive an invitation email asking them to become a billing manager for your organization. Once the invited person clicks the accept link in their invitation email, they will automatically be added to the organization as a billing manager. If they don't already have a GitHub account, they will be directed to sign up for one, and they will be automatically added to the organization as a billing manager after they create an account.
+The invited person will receive an invitation email asking them to become a billing manager for your organization. Once the invited person clicks the accept link in their invitation email, they will automatically be added to the organization as a billing manager. If they don't already have a {% data variables.product.prodname_dotcom %} account, they will be directed to sign up for one, and they will be automatically added to the organization as a billing manager after they create an account.
 
 {% data reusables.organizations.billing-settings %}
 1. Under "Billing management", next to "Billing managers", click **Add**.