https://www.mass.gov/how-to/transfer-your-registration-and-title-from-out-of-state

Did you mean April 2023? The dealership you financed in house with should be able to provide you documentation of the loan agreement with a copy of the title. I think the DMV is getting confused if you're telling them the car is paid off and requesting the original title. In house financing isn't as big of a thing in Massachusetts as it is in the south as far as I know.