Whether you can change your seat from B.Com Hons to B.Com Computers depends on the specific MHT CET counselling process and the availability of seats.

The official MHT CET CAP counselling brochure typically outlines the seat allotment process, including information on seat upgrades or changes. Look for the brochure on the MHT CET website

During the counselling process, there might be a window for candidates to express interest in upgrading their seats. This could involve indicating your preference for B.Com Computers (if available) in a designated section.

MHT CET might have a helpline available to answer your questions regarding seat changes. Look for the contact information on their website and call them to clarify the options for changing your seat from B.Com Hons to B.Com Computers.

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I hope it helps!