To make the biggest technology backbone for tax filing more convenient, GST Network (GSTN) has started conducting surveys by calling up taxpayers enquiring about their experience on the portal.<br/><br/>GSTN Chairman Ajay Bhushan Pandey said in New Delhi that, about 500 calls a day are made from a full-fledged call centre seeking feedback from businesses which have filed returns.<br/> <br/>Mr Pandey said, the GSTN system is a new system and their priority is to address the current problems and make things smooth for people<br/> '<br/>GSTN, the company building the IT backbone for the biggest indirect tax reform, had in June opened a call centre and publicised the helpline number for taxpayers with enrolment related queries.