Yes.. act to gst law sales to and by sez unit is treated as inter-state supply....thus u have to show this sale under supply to sez in gstr1 (IGST will apply in case of sales to sez unit)
Sir kya isko frr zero rates supply treat krege kya??? Agr supplier k pass LUD hai.....but in this case he already collected gst.... then..... WITH payments of tax or without payment of tax.... he has two options..... my tell us how can we treat this case
LUT will applied by Supplier's responsible as You. If not then pay IGST Tax from Your pocket as with payment and file refund application. If You got LUT then file as Without payment.
Excess payment will refund to Customer or adjust future supplies...