India, March 17 -- Raghav Chadha has proposed allowing married couples in India to file joint income tax returns, saying optional joint filing would ensure that households with uneven incomes are not unfairly penalised, reduce the tax burden on single-income families, and bring greater tax equity, similar to systems followed in countries like the US, Germany and France.Speaking in Parliament on March 16, the Rajya Sabha MP and Aam Aadmi Party (AAP) spokesperson, said the move would help ensure that families with uneven incomes are not unfairly penalised. If implemented, he argued, households with similar overall earnings, regardless of how income is split between spouses, could receive comparable tax benefits, potentially easing everyday ...