Sensex, Nifty close at a seven-week high as HDFC Twins, Infosys, ICICI Bank lead. Meanwhile, as April marks the beginning of a new financial year, the government has revised the Income Tax slabs under the new tax regime to make it more attractive. We break down why you need to choose your tax regime in April, on this episode of NDTV and BQ Prime's 'Let's Talk Business'.