Reply To: I need to set authorship in my tag page

If you want to use third party authorship plugin simply leave the profile field of Google+ empty.

Another solution would be making use of the following code.

For Category pages

<?php if ( is_category() ) {?>

 Insert your google_ authorship code here..

<?php }?>

For Tag pages

<?php if ( is_tag() ) {?>

 Insert your google_ authorship code here..

<?php }?>