Go to the official Netflix website; the Member Sign In screen will appear. Enter your email address and password into the appropriate fields, and then click on the “Continue” button. If you want to always remain logged in, click on the box next to the "Remember Me on This Computer" field so that it's selected.
Click on the “Your Account & Help” option from the top right corner of the page to access the Your Account and Help page once you are fully signed into your account.
Scroll down towards the bottom of the page and click on the “Account Profiles” option below the “Preferences” heading. The DVD Screen Profiles pages will appear showing your name, assigned DVDs and maturity level.
Click on the “Edit” option next to your name and below the "Change" heading to bring up the Your Account screen. Click on the drop-down menu next to the “Maturity Level” field. Make sure you select the correct profile for which you want to change the maturity level.
Select “All Movies”, “R”, “PG-13”, “Unrated Family”, “PG” or “G” and then click on the save button at the bottom of the screen. You will return to the Your Account and Help page, and you will then be able to search by rating based on what you selected.