regarding partnership

my father Nd his friend get into partnership since 1992 from then only the partnership is in existence . just two days before he has send the termination notice to my father . in his contention he is treating my father as employee Nd considering the business as sole proprietorship . but my father has partnership deed with him which is registered one . the only point they have is the firm was paying 5% tax whereas the partnership firm has to pay tax 30% . also the properties bought in the name of firm in which my father contributed equally bears his signature only . is there any way for us?