AWS Organization Billing

You will only get one invoice from AWS per Organization.
https://docs.aws.amazon.com/awsaccountbilling/latest/aboutv2/consolidated-billing.html

However there are multiple ways to generate reports and break down cost and usage data.

• Use Tags and Cost Categories to generate reports in the cost explorer: https://docs.aws.amazon.com/awsaccountbilling/latest/aboutv2/manage-cost-categories.html & https://docs.aws.amazon.com/awsaccountbilling/latest/aboutv2/cost-alloc-tags.html

• Use Billing Conductor: https://docs.aws.amazon.com/billingconductor/latest/userguide/what-is-billingconductor.html

• Check out the Lab that shows how to integrate Organizational data with your cost and usage report data: https://www.wellarchitectedlabs.com/cost/300_labs/300_organization_data_cur_connection/

It's possible to have several Tax Invoices within one AWS Organization. Requirements: (1) same currency for all invoices; (2) every account should follow the same payment method. E.g. you can do wired transfer from several legal entities to cover several Tax invoices within the same AWS organization. But you cannot combine credit card and wired/SEPA transfer.

Please use Tax Settings in your Management Account > Billing to indicate information about legal entities for each Linked Account https://repost.aws/knowledge-center/update-tax-registration-number