The GST law requires that every claim for refund is to be filed within 2 years from the relevant date. Two year from the due date for furnishing of return under section 39 for the period in which such claim for refund arises
Date has been extended vide notification no 35 and 55 Further there is no refund for 2017-18. Want to claim for 2018-19 for which i have to file nil refund for 2017-18 but july month is not visible on portal