Yes. Driving-Tests.org is an approved theory training provider for 49 states (excluding WA) and Washington, DC. It is listed on the Training Provider Registry (TPR).
(switch to the "Online" tab to locate Driving-Tests.org or search for "Driving-Tests.org")
After you complete our CDL Premium program for your state and reach a Passing Probability of 80% or better, we will electronically notify the Training Provider Registry (TPR) that you’re qualified to take the official CDL knowledge test. After your training completion certificate has been successfully submitted, you can head to your nearest DMV office or DMV-approved third-party testing organization and take the test.