Personal Finance ITR filing: How to check validity of Form 16? Updated : September 19, 2020 04:50 PM IST Form 16, a certificate issued by an employer, contains the information that one requires while filing the income tax return (ITR). These certificates provide details of TDS/TCS for various transactions between deductor and deductee. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.