Click on the tag that you want to delete. For example, I saw that one of your tags is “phone.” Click on that and a page should load that lists your goal (or goals) that are tagged phone. Click on the goal and it will take you to that goal’s page. On the right side of that page there is a section called Your Tags. There should be a “phone” tag with an X in parenthesis next to it. Click on the X to delete the tag.

I think that if you have a tag that is on more than one of your goals, you have to go to each goal’s page and delete it one by one. I’ve also noticed that if you don’t add any tags to a goal, other people’s tags for that goal will automatically show up on your page.