first IFTTT
If
You are tagged in a photo
This Trigger fires every time you are tagged you in a new photo. NOTE: Facebook privacy settings may block IFTTT’s access to some photos you are tagged in. Learn more
Then
Post a tweet
This Action will post a new tweet to your Twitter account. NOTE: Please adhere to Twitter’s Rules and Terms of Service. Learn more
Explore more great ways to automate Twitter and Facebook