From your Sales Order page, select the orders you would like to Add or Remove tags for > from the Bulk Actions menu > select Add Tags or Remove Tags > Type in the tags you would like to add/remove > click on Add Tags to add or Remove Tags to remove.
From your Sales Order page, select the orders you would like to Add or Remove tags for > from the Bulk Actions menu > select Add Tags or Remove Tags > Type in the tags you would like to add/remove > click on Add Tags to add or Remove Tags to remove.