ITR-3 is divided into:
Part A-Gen: General Information of taxpayer & business.
Part A-BS: Balance Sheet of the business or profession for the FY.
Part A-P& L: Profit and Loss statement of the business for the FY.
Part A-OI: Other Information.
Part A-QD: Quantitative Details.
Part B: Outline of the total income and tax computation on the net income chargeable.
Verification.
Tax Payments: Details of advance tax, TDS, etc.