GST ON WORK CONTRACTS

Gurjeet (Accounts) (107 Points)

06 September 2022  
My client did the government contract during the period Apr 22 to May 22 months. But payment from the department arrived in Aug 22. The gst increased from 12% to 18% from 18-7-22. We issue the Invoice at the time of payment received. I want to know which gst rate is applicable on such work the 12% gst or 18% gst ?
Pls suggest with rulling.