Section 11(2)(a) in The Goods and services Tax Settlement of funds Rules, 2017
(a)On the basis of the above ledgers provided by Goods and Services Tax Network for every month, the Central and respective State Accounting Authorities, the Board and the State tax nodal authorities shall reconcile the details of the payments received, Input Tax Credit cross-utilisation and apportionment details received from Goods and Services Tax Network, and shall revert to Goods and Services Tax Network and Principal Chief Controller of Accounts in case of any discrepancy by 20th of the subsequent month.