First, log in to Liquid and go to Clients
Then click on the Client card. This will open the "back" of the Client card.
On the back of the Client card, you'll see the documents that you have signed and agreed to with your Client.
The Master Contract is listed up top and in the Other documents section, you will find any other documents you've signed, including your IRS W8 form or IRS W9 form.
For example, if you have signed a CIIA (Confidential Information and Invention Assignment Agreement), NDA (Non Disclosure Agreement), or other documents, those will be visible in this section.