CSP Partners - Statements (not to confused with a Tax Invoice)

Microsoft provides Tax invoices every month to Partners. But why do they not provide Statements, even a formal channel by which we as Partners can make a request for a certain period/periods?

Our Auditors needed Statements for 2 financial periods for our complete Azure bill, all we had were the Tax Invoices that Microsoft send us Partners. Tax Invoices and Statements as we know serve two very different purposes.

Anyone knows why Microsoft does not provide Statements, and if not, is that a a formal channel on the portal to make these requests as and when we need  Statements for a given period?