Hi@akhtar,
You can create or update tags for the specified Auto Scaling group. When you specify a tag with a key that already exists, the operation overwrites the previous tag definition, and you do not get an error message. The below example adds two tags to the specified Auto Scaling group.
$ aws autoscaling create-or-update-tags --tags ResourceId=my-auto-scaling-group,ResourceType=auto-scaling-group,Key=Role,Value=WebServer,PropagateAtLaunch=true ResourceId=my-auto-scaling-group,ResourceType=auto-scaling-group,Key=Dept,Value=Research,PropagateAtLaunch=true