where can I find the IRB forms to fill out on the computer?
I will attempt to answer the question, though I work in the Library and not Student Services, nor am I actually at the AU SFBA campus (there isn't a librarian at AUSFBA answering questions through this forum).
For Argosy Twin Cities campus students, the IRB handbook can be found in the Student Portal/Campus common, on the Academics page, linked to in the Department Specific Forms & Documents area under each department (choose the department you are taking courses in, in case there is a difference between Business, Education, and Psychology IRB handbooks. The document (for us here) is called Argosy_University_IRB_Handbook. It doesn't appear to give you the ability to fill it out online (perhaps you would need to contact your Student Services department, or your campus' department chair for your program). Perhaps you would need to have a version that allows for computer entry emailed to you directly. The AUSFBA Student Services department phone number is 510-217-4791 (but probably is only available weekdays).
I hope that gets you started, anyway. Good luck!
AUTC Library (answering questions for AUSFBA Library)