Leaving a YELP review is pretty simple and the main thing is you need to have a YELP account in order to leave a review. create a Yelp user account
Once you have that setup, its just a matter of clicking the above link and visiting the Sandefer Law Firms Yelp page and clicking the Write a Review button. Below are the instructions from the YELP page.
Once you’re logged in, you can locate the business you’re trying to review by using the search bar located at the top of any page on the website or from the search button on the app. Enter what you’re looking for in the first window (either a specific business or a category), and the location in the second. There are also search filters you can use to narrow your results.
Once you’ve located the business page, it’s simple: click or tap Write a Review and you’ll be led through the remaining steps to finish.