Finance Minister Nirmala Sitharaman on Tuesday extended the deadline for filing GST returns for March-May to June 30. On late filing of GST returns, no late fee, penalty or interest will be charged for companies with turnover of up to Rs 5 crore. For companies with more than Rs 5 crore turnover, no late fee and penalty will be charged on GST return filed by 15 days. A reduced interest rate of 9 per cent will be charged, she said.