Government work contract

GST @ 12% is applicable on Government Works Contract on the Transaction Value.

As per the Provision of Section 15(1) of the CGST Act 2017 [ Valuation Provision ], GST is levied on the "TRANSACTION VALUE". Transaction Value is calculated in accordance with the Provision of Section 15(2) & 15(3) of the CGST Act 2017.

Sir got government tender before GST now still work is going on ,now they are not giving GST amount.
so can I take GST amount included in contract amount

Will be levied on Transaction Value

You pay GST @ 12% on payment received from government under the contract. Once the final bill is made, you will have to pay the balance tax.