How to post to Tumblr account posts to Twitter. Connecting Tumblr and Twitter Accounts
1. Go to Tumblr
2. Click on your profile (the little person top right)
3. Click the Settings gear icon in the list.
4. Look on the right side for the word Dashboard and click Dashboard
5. Click the blog you want to connect
6. Click Share on Twitter to share on your Twitter feed. or, Share on Facebook
7. Click on Authorize App