I forgot to select IIMA FABM as one of my preferred courses. And I am quite inclined towards it. Can I possibly do anything now?

Thanks for the answer! Just for the sake of it I'll try and call the admission department once. But I prolly know the answer

Admission into IIMA FABM is based on CAT score and you need to apply during the CAT application process. The window for editing the application is closed and you will not be able to apply to that program now.