You can add your Social Media links to your profile information. To do so in Community click on a title you want to request (or any title, your profile will save without you having to actually submit a request). Select the pencil icon next to your Saved Profile, and then on the next screen click the tab for links. Enter the links you have and click the save icon! You can then exit the pop-up and your links should save for your next request.
A quick note with these that you’ll want to make sure to include full URL links and not just your handles. So, for example your Twitter link should look like https://twitter.com/handle. Otherwise the link won’t work correctly from a publisher’s end if they click it to learn more about you.