ITR filing is indeed very important for everyone, including housewives, as it serves as a crucial document for various financial activities. Even if you don't have taxable income, filing a "Nil" return or declaring small incomes like interest from fixed deposits in your name establishes your financial footprint and provides proof of income, which is often required for loan applications (like home or car loans), visa applications, or even for certain investment purposes.

It also helps you claim any Tax Deducted at Source (TDS) refunds, carry forward losses from investments, and avoid future penalties. Your husband might be asking you to file for these very reasons, perhaps for a joint loan, to document investments made in your name, or simply for better family financial planning and transparency. It's a step towards financial empowerment and documentation for you.