I want when i closed sc task manually then request and ritm not to closed should be open?

[bhujangi gawal2]

using BR

[Dr Atul G- LNG]

That is not the case. If you close a task, it follows the workflow or flow designer that you have configured. A REQ follows a standard process, and based on the actions defined in the flow, the RITM and REQ states and stages get updated accordingly.