The Continue and Back buttons don't work because there is an error in the employee information, but the employee information is not displayed, so you don't see the error. At the bottom of the page, below the employer name and address, click on "Show employee info." You should see an error indicated for one of the boxes. Correct the error. Then clicking Continue (or Back) should work.
This section of the program is very slow. After you click anything you have to wait a few seconds for it to react.
