New Delhi, June 1 -- Central and state governments collected over Rs.2 trillion in Goods and Services Taxes (GST) in May before adjusting for refunds, official data showed on Sunday, a 16% annual improvement that sustains the robust tax performance seen in the previous month.

The collections in May also benefited from the strong 25% growth in gross receipt of Integrated GST or IGST-the type of GST levied on imported goods, showing strong import value growth at the beginning of the current financial year amid trade uncertainty.

In April too, IGST on imports had grown nearly 21% before refunds, compared with a 13.6% growth in March, prompting some experts to flag the possibility of dumping of goods into India by other countries as the Tru...