WAIS-IV stands for Wechsler Adult Intelligence Scale-4th Edition. It a clinician administered test--i.e. it cannot be taken online. The test is only sold to clinicians--licensed psychologists--who are trained to use it. You need to see a psychologist to get it done. Sometimes you can get a free assessment at a university clinic with a Ph.D. program in clinical psychology. However, if you walk in and simply request an IQ test, your request might be declined, just like you might be refused and MRI if you walked into a neurologist's office and asked for one. More often than not, the psychologist will inquire as to why you want the test. In fact, it would probably be a violation of professional ethics to not discuss your history and presenting problems before tests are given.