Dear Kamal,
Please note that sales to SEZ are treated as Physical Exports i.e. just like Exports to Countries outside India. You have to prepare ARE-1 and clear goods either on payment of duty or under BOND/LUT. Do mention Advance Authorisation No. on the copies of Invoices & ARE-1.
On Receipt of Payment, do request your Bankers to update online E-BRC so that the same may be filed with the copy of ARE-1 duly attested to the DGFT office for redemption /EODC of Advance Authorisation.
You need to submit ARE-1 Original = Duplicate with Central Excise for claiming rebate of duty, if you are not availing drawback against SEZ supplies or for release of Bond.