Fixed deposits offer safe, assured returns but are taxable under income tax laws. Taxpayers who missed declaring FD interest can file an updated return (ITR-U) within four years, allowing for corrections with varying additional tax penalties based on the filing time. Details here. Fixed deposits offer safe, assured returns but are taxable under income tax laws. Taxpayers who missed declaring FD interest can file an updated return (ITR-U) within four years, allowing for corrections with varying additional tax penalties based on the filing time. Details here. by Soban News (international And National News)