1. Run the SQL Server Management Studio, and then connect to your SQL server.
2. Click New query, and then enter this: select @@version
3. Press F5 to run the query.
4. Copy the result line, e.g. Microsoft SQL Server 2008 R2 (RTM) - 10.50.1617.0 (X64) Apr 22 2011 19:23:43 Copyright (c) Microsoft Corporation Standard Edition (64-bit) on Windows NT 6.1 <X64> (Build 7601: Service Pack 1)