<p>If the questions are related to the programming APIs then the best place would be SO.</p>

<p>If it is about twitter in general, you need to use the twitter support sites, as this is outside of the scope of S[OFU]. Twitter falls under the same category as Facebook discussed <a href="http://meta.stackexchange.com/questions/30475/official-stance-on-facebook-questions-on-su">here</a></p>