CBIC has urged tax payers to file their monthly GST returns for May by 20 June as delay would lead to late fee and interest liability. The tax authority specifically reminded tax payers who have not subscribed to the quarterly return filing scheme as well as online service providers to file their monthly tax return. “Late filing of GSTR-3B return will attract late fee and interest," CBIC said in a social media post, reminding businesses that only two days are left for meeting their compliance deadline.