Hi@akhtar,
You can add metadata tags to an AWS DMS resource, including replication instance, endpoint, security group, and migration task. The following add-tags-to-resource example adds tags to a replication instance.
$ aws dms add-tags-to-resource --resource-arn arn:aws:dms:us-east 1:123456789012:rep:T3OM7OUB5NM2LCVZF7JPGJRNUE --tags Key=Environment,Value=PROD Key=Project,Value=dbMigration