Dear sjebner,
Thanks for using our plugin.
For adding the twitter handle you will have to make some changes in the plugin’s PHP files. Please read on.
Open the file small-buttons.php (located in wp-content/plugins/simple-social-share/includes). Go to line number 8 which should look like below
<a href="https://twitter.com/share" class="twitter-share-button" data-count="none">Tweet</a>
Suppose your twitter username is xyz
then add data-via="xyz"
before data-count="none"
in above line with space in between two. So after addition line number 8 should look like
<a href="https://twitter.com/share" class="twitter-share-button" data-via="xyz" data-count="none">Tweet</a>
Let us know if this works or not.
Thanks & Regards,
Perials Team.