To start the withdrawal process on the Desktop Site, simply find the person icon in the top-right corner of the page to access the account menu, then click "Withdraw".
This is displayed below: 
From here, select the method in which you would like to withdraw using the tabs under "New Request", then the "account", amount, then press "Authorize Withdrawal".
This is displayed below:
If you would like to review our withdrawal options, please review the following article: Withdrawal Options
If you are having problems requesting a withdrawal, or you have additional questions please click the "Message Us" button from the support center, or email us at Support@TVG.com.