The article below will detail the process of placing a wager on your TVG account from your desktop:
Whenever you are logged in to your TVG account, there will be a visible yellow Create Bet button in the upper right-hand corner of your display screen. Please select this Create Bet button to begin the process of creating and placing a wager.
This selection is displayed below:
Once you have selected the Create Bet button, this will open a Bet Ticket. On your Bet Ticket, you can select the Track, Race Number, Bet Type, and Bet Amount using the drop-down menus at the top of the Bet Ticket. Click the squares to the left of the listed horse's names to select the horses you wish to include in your wager. Once you have selected your specific wager type and the included horses, simply select the green "Confirm Bet" button to proceed with your wager placement.
These selections are shown below:
The "Confirm Bet" button will show as a pale green and read "Please make your selection" if you have not created a valid wager. If this occurs, please review and revise your wager and once more proceed by pressing Confirm Bet. 
You will then be asked to confirm you wager. Please use this time to review your wager to ensure all your desired selections are included.
Please note, you can turn off all future wager confirmation messages by checking the box toward the bottom of the ticket (indicated below).
Once you have reviewed your wager, simply select "Submit Bet Now" to confirm and place the wager.
You will then get a final confirmation message when your wager is placed (displayed below).