Within Teamwork Spaces, you can view your subscription invoices via your subscription settings.
Click your profile image in the top right corner of your site and choose Subscription.
From the Invoices sub-section, you can view a list of all of your historical subscription invoices. This list will include the invoice date, number, subtotal, tax amount, and total cost.
Clicking an invoice number will open a PDF version of the invoice which you can then save or print.
For more information, see: Updating Your Payment Details