Hi,
Follow the following steps
1. Understand the business carefully with all the aspects. For eg. Industry profitabilty, Customers, nature of contracts, milestones of payments, fund arrangements etc.
2. Study the previous year audit report
3. Study accounting under AS 7
4. Study also the income tax implication of AS 7
5. Broadly review current accounting system for eg. Recording of purchase of material, issue of material, cost tracking, accounting of milestone payments, contract payments etc. Notice that revenue is the concerned area in this business. All other are all around revenue. Also analyze fund arrangements for eg. Realted party loans, secured loan arrangements etc.
6. Review the TDS compliances
For any furher query can contact me at prcharkha @ gmail.com or + 91 98909 34352. I have extensive experience in real estate audits. Can help you in practical issues.