Exporters asked the govt to fast-track the refund process and avoid further deterioration in their "liquidity situation".
As much as Rs 42,000 cr has already come in as taxes so far in the first monthly filing under the new GST regime.
Banks importing gold and precious metals will have to pay 3% tax under the GST which can be claimed as input tax credit, govt said.
"Taxpayers can log into their account at the GST Portal and file their GSTR-3B return any time," Navin Kumar said.
The collections from customs duty and IGST from imports post implementation of GST has almost doubled to Rs 30,000 cr in July, govt official said.
The CGST (Extension to Jammu and Kashmir) Bill, 2017, would provide for levy of the GST on goods sold and services rendered in the state.
The Cabinet approved a draft bill to replace ordinances that were promulgated to introduce GST in Jammu and Kashmir.
Providing relief to SEZs, the govt has exempted goods imported by units or developers of special economic zones from IGST.
GST will irreversibly impact consumers, traders, businesses as well as the revenue collection machines of the states and the centre.
The Finance Ministry has started notifying various provisions of law relating to interest calculation, input tax credit and valuation.
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