IGST on imports requires GSTIN on customs forms and electronic GSTN validation for credit and export refund claims. Imports will attract IGST and applicable compensation cess in addition to customs duties; the value for these levies includes customs value plus customs duties but excludes the IGST and cess. Bills of Entry and Shipping Bills have been revised to require declaration of GSTIN (or PAN/state code for non registrants) and to capture item wise taxable values and IGST for electronic validation with GSTN. Customs EDI will reconcile import credits and validate export refunds or proof of export; non EDI locations must adopt digital upload utilities to enable electronic validation.