Economy CAG report on GST slams IT system, slow process of refunds; claims invoice matching and ease in compliance crucial Updated : July 30, 2019 08:40 PM IST CAG has made a serious observation on the revenue position under GST, saying that the revenues under GST are declining. CAG has also observed that even after two years of the GST roll out, system-validated Input Tax Credit through “invoice matching” is not in place and non-intrusive e-tax system still remains elusive. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.