Step 1: Understanding Section 44AA(2)(i).
This provision mandates compulsory maintenance of books of account by certain professionals and businesses depending on income or turnover levels.
Step 2: Income limit.
If the income from business or profession exceeds ₹1,20,000 in any of the three preceding years, the assessee must maintain books.
Step 3: Conclusion.
Therefore, the correct income threshold is ₹1,20,000.