Vonage has recently updated the online user interface to manage their service. You can view the details of past invoices through your Billing History by following the steps below:
1. Sign into your Online Account.
2. Click the Billing tab and then select View Bill.
3. To the right side of the Billing Statement section, select the invoice you want to view from the drop down menu.
Note: You can click on the each topic like Monthly Charges, Usage Summary, Surcharges and Government Mandated Taxes & Fees. The detailed taxes and fees will be displayed.