Once you upload your image, under "Create" you click "Transparency" and then you click the background color (which should be a different color from any other you've used in your picture) and press the "convert" button at the bottom, then you click "Return to Main Index page" and under "Convert" press "Convert to PNG" so you can upload it to deviantart without a preview. XD then you just save it. ;u;
LOLNOIMKIDDING you guys are cuties ;u;