I get an error when I try to upload my EC W2 file to Oklahoma TAP. Does anyone know what these Kind of Employer codes are for the state of Oklahoma? Google doesn't know or won't tell me. Even if it did tell me, I have no idea how to enter this code anywhere in the software (I looked and was just going to pick a code). There doesn't appear to be a box on the W2 for this code to go in so I guess I'm just as frustrated as everyone else. Does anyone know anything about this?