
Hi @Danielle Gallo,
Thank you for posting your question in the Microsoft Q&A forum.
If you are requesting for Microsoft’s W-9 tax information you need to create a support report (support requests for billing are free of charge) via Azure portal: How to create an Azure support request - Azure supportability | Microsoft Learn
(It appears that Microsoft does not make the W-9 publicly available for download and typically provides it through a private message or direct communication after a support request is initiated.)
Here is the link to raise a Microsoft support ticket Azure Billing Support they will assist you to resolve your query.
Please let me know if you have any further questions after reviewing these answers.
Looking forward to your response!
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