fix warning

Author: Maddie Minnick

articles/cost-management-billing/cost-management-billing-faq.yml

@@ -50,10 +50,10 @@ sections:
           Azure finalizes or closes the current billing period up to the fifth day after a closed month. Changes might continue and change until the fifth day after a billing period ends as the billing system processes data.
       - question: How do I update my payment method?
         answer: |
-          See [Change your Azure payment method](manage/change-azure-payment-method.md).
-      - question: How do I get a copy of my tax invoice?
+          See [Change your Azure payment method](manage/change-credit-card.md).
+      - question: How do I get a copy of my tax documents?
         answer: |
-          See [Download your Azure tax invoice](understand/download-azure-invoice.md#download-your-tax-invoice).
+          See [Download your Azure tax invoice](understand/mca-download-tax-document.md).
 
   - name: Cost Management questions
     questions:

articles/cost-management-billing/toc.yml

@@ -301,7 +301,7 @@
     href: enterprise-agreement-faq.yml
   - name: Partner FAQ
     href: partner-faq.yml
-  - name: Reservation and Savings Plan FAQ
+  - name: Azure Savings Plan and Reservations FAQ
     href: ri-asp-faq.yml
   - name: Discover cloud footprint FAQ
     href: manage/discover-cloud-footprint.md