I Told Human Resources I Had A Degree. Job Didn’t Req. It. They Asked For My Transcripts I Am 3 Courses Short.?

Was asked in interview if I had a degree I said I did-AS Computer Info Systems. I thought I had all credits for it and didn’t think they would check anyway because I have many microsoft certifications. Now they asked for my transcripts. I have the job and start in a few days and bring it in then. How do I explain this to human resources? I am 3 classes short of my degree because not all classes transferred from last college.