When you log into your account, you will be taken straight to your dashboard. At the top of the page there is a purple Add a Pet button. Click there to start the process of adding your pet and select if this pet is your pet that is lost, or a pet that you found.
Upload a photo of your pet by clicking on SELECT IMAGE and be sure to fill in every prompted question.
Once all data fields are complete, click on the purple Save Pet Details icon to save info. The new pet should now be displayed under My Pets.