Go to the website provided by TkFast:
https://vpn.insertdomainname.com
Then Login with login credentials given by TkFast, it will attempt to do a Web-Based install. If it fails, it will allow a manual install by clicking the link "Mac OS X 10.6+ Intel)" *Depending on what OS you have on your Mac will determine if this automatically installs.
After you click the manual install it will start downloading you install the new software as normal procedure with installations. Once installed open the software Cisco AnyConnect Secure Mobility Client in your "Applications" folder under "Cisco."
Once open it will prompt you for a server name, use the address provided to you by TkFast. It will then prompt for your username and password, once entered press "OK"
After connected an icon will appear in the top toolbar (by the battery, time, etc). You can disconnect from this icon as well. Once connected via VPN you can Remote Desktop to your workstation.