With tax-filing regulations changing every year, it can be a headache for filers as they have to keep themselves abreast of the latest rules to ensure an error-free filing. Many, therefore, end up making mistakes. That is, out of 67.5 million taxpayers who filed income tax returns in the last assessment year, 12.5 million received tax notices, according to Vishvajit Sonagara, founder of Quicko.com, an online tax filing website. A majority of these were salaried, and the details these taxpayers had mentioned in the income tax return forms didn’t match with those in Form 26AS. “Over the years, the tax