Gst on work contract

Jai Kumar (business) (17 Points)

22 July 2017  

A government contractor has pending payments with department for construction of school building. no transfer of land takes place here. The bills passed have been deducted with 4% VAT on 31-03-17 and the payment is yet to be done. Now the payment will be released in GST regime and Vat does not exist. What should he do as the government department is also clue less. ?