Section 44ada for professional firms

A professional partnership firm having gross receipts of INR 10 lakhs and having expenses (Before Interest and remuneration to partners) of INR 4 lakhs. now whether this needs to declare income at 50% of 10 lakhs and pay income tax of 1.5 lakhs as interest n remuneration is not allowed further.

whether this firm needs to get his books audited if it doesnt show income at 50%. further what about interest and remuneration in partners individual capacity ? taxed or exempt