Additional Fields Coding

I need to be able to add a line of text with a link to the right of the checkbox (see attached pic). I like the way the Google calendar button and checkbox line looks. The circled red part is what I'm wanting to add but have the underlined area link to a specific page or pop up (where the link goes isn't super important at this point). This site is my test environment. Our live site is not updated yet.

Thank you!

~Suzy B