Business or professional income is classified into 3 categories
1. 44 AD
44 AD is Business Income with gross turnover less than Rs 2 crores.
2. 44 ADA
44 ADA is Professional income (i.e doctor,CA,consultant) with gross receipt less than Rs 50 lac
3. 44 AE
44 AE is transport income up to 10 vehicles with the person engaged in business of plying,hiring and leasing of goods