Does anyone know if we can take the GREs and send in our scores after we've already submitted our apps electronically or through mail for non OTCAS schools?
Yes, you should be able to. It's also a good idea to contact the program yourself and let them know that you plan on sending in your scores after submitting the OTCAS app. Most programs require that you send them your GRE scores directly anyways.
Does anyone know if we can take the GREs and send in our scores after we've already submitted our apps electronically or through mail for non OTCAS schools?