18- 125 C.M.R. ch. 812, § .05
In the case of a bachelor's degree and a graduate degree awarded simultaneously, the eligible loan payments made during the taxable year for tuition and fees associated with courses taken to acquire the degrees must be apportioned between the degrees using the proration method specified in this section. The proration method is used (1) to apportion amounts due and amounts paid between two separate qualifying degrees for the purpose of claiming each individual credit, and (2) to remove amounts due or amounts paid on loans associated with a nonqualifying degree. Tuition and fees of a course that could reasonably be apportioned to either of the degrees must be apportioned to one degree or the other. For each degree, the proration is a fraction, the numerator of which is the tuition and fees of the courses taken to acquire that degree and the denominator of which is the total tuition and fees of the courses taken to obtain both degrees. The combined tuition and fees apportioned to each degree may not exceed the total tuition and fees to obtain both degrees.
18- 125 C.M.R. ch. 812, § .05