Section 54(1) in The Central Goods and Services Tax Act, 2017
(1)Any person claiming refund of any tax and interest, if any, paid on such tax or any other amount paid by him, may make an application before the expiry of two years from the relevant date in such form and manner as may be prescribed: Provided that a registered person, claiming refund of any balance in the electronic cash ledger in accordance with the provisions of sub-section (6) of section 49, may claim such refund in the return furnished under section 39 in such manner as may be prescribed.