For a maven project a Jar file needed for my code but which is not in maven repository so, I have downloaded and added the jar file in configured remote repository.
I want to add dependency of the jar. so i would like to know
<groupId>?</groupId>
<artifactId>?</artifactId>
<version>?</version>
Also i like to know where i can find these details in the jar
You need to install this JAR into your own repository, see this official tutorial.
Now include this installed artifact into your project as a regular dependency.