There are several reasons why you may not be able to access your SSA account online. One possibility is that you do not have an account yet. If this is the case, you can create one by visiting the my Social Security page and selecting "Create an Account." Another reason could be that you are entering your username or password incorrectly. Make sure that you are typing in your information correctly and that your caps lock is not on. Finally, if you are still having trouble accessing your account, you can contact the Social Security Administration for further assistance.