The High Cost of Small Slips
Filing an Income Tax Return is a mandatory annual exercise, but accuracy is just as important as timeliness. The Income Tax Department's systems are now highly automated, cross-referencing the information you provide with data from various financial institutions.
An incorrect filing can trigger a defective return notice under Section 139(9), which requires you to correct the error within a specified timeframe. Failure to do so can render your return invalid, as if it were never filed at all. More severe consequences include penalties for underreporting income, which can be 50% of the tax payable, or misreporting income, which can attract a penalty of 200% of the tax amount. Furthermore, simple mistakes like incorrect bank details can significantly delay any refund you might be due.
Your Three Pillars of Truth: AIS, Form 26AS, and Form 16
Before you even begin filling out your ITR, your first step should be to download and review three key documents from the e-filing portal: Form 16 (for salaried individuals), Form 26AS, and the Annual Information Statement (AIS). Think of these as your pillars of truth. Form 16 is the TDS certificate from your employer. Form 26AS is a consolidated tax statement showing all taxes paid against your PAN, including TDS, TCS, and advance tax. The AIS is the most comprehensive document, providing a detailed summary of your financial transactions during the year, including interest income, dividends, securities transactions, and more. Many taxpayers mistakenly assume the pre-filled data in the ITR form is automatically correct. It is not. The responsibility to verify this information against your own records rests entirely with you. Mismatches between these documents are a primary reason returns are flagged for scrutiny.
Declare All Your Income Sources
One of the most frequent errors is failing to report all sources of income. Your salary is just one part of the picture. The tax department receives information directly from banks and financial institutions about your other earnings. You must declare income from all sources, including interest earned from savings bank accounts (deductible up to a limit), fixed deposits, and recurring deposits. Other commonly forgotten income streams include dividends from shares and mutual funds, rental income from property, and any earnings from freelance work or a side hustle, no matter how small. If you have sold shares, mutual funds, or property, you must report the capital gains or losses accurately. Ignoring these can lead to an income mismatch notice from the department.
Get Your Personal and Bank Details Right
It may seem basic, but clerical errors are a common cause of filing issues. Double-check that your PAN, Aadhaar, date of birth, and contact information are correct. Most importantly, ensure your bank account details are accurate and that the account is ‘pre-validated’ on the income tax portal. The tax department issues all refunds electronically to pre-validated accounts. An incorrect account number, a wrong IFSC code (especially after bank mergers), or a non-validated account will lead to refund failure. This simple check can be the difference between a swift refund and a long wait.
Choose the Correct Form and Tax Regime
The tax department has different ITR forms for different categories of taxpayers. Using the wrong form is a fundamental error that will cause your return to be treated as 'defective'. For instance, a salaried individual with income up to ₹50 lakh and one house property would use ITR-1. However, if that same person has income from capital gains, they must use ITR-2. Similarly, the choice between the Old and New Tax Regimes has significant implications. The New Regime offers lower tax rates but disallows most common deductions like those under Section 80C and 80D. A common mistake is opting for the New Regime while still trying to claim deductions, or vice versa. Analyse which regime is more beneficial for you before you file, as this choice can impact your overall tax liability.
















