To Update your Billing Info, click your UserName in the top right corner, and select Billing Info from the drop-down box:

Under the Billing Info tab, click Edit button in the Billing Information section:

Clicking Edit displays a form to enter in your credit card details & billing address information:

Once you've completed all required fields, click Submit. 

If you have any questions about billing, please email us at support@timetap.com and we'd be happy to answer them.