This is what I did:
I submitted my application with transcript in the fall.
After fall semester, I entered in my fall grades via Academic Update. I then reprinted the transcript request form from OptomCas and then went to my university's registration office and had them send out an updated transcript with fall grades. You pay your school whatever fee it costs to send a transcript and have them send it to the address for OptomCas. OptomCas then verifies the grades you entered with the transcript and then they send an updated version to the schools you applied to. Keep in touch with the schools to make sure they receive it.