Stored procedure giving error while implementing

While implementing the procedure I am getting error as

Msg 156, Level 15, State 1, Procedure GET_USER_REPORT_DATA, Line 19 Incorrect syntax near the keyword 'select'.

Msg 102, Level 15, State 1, Procedure GET_USER_REPORT_DATA, Line 23 Incorrect syntax near ')'.

Here is the procedure

ALTER PROCEDURE [dbo].[GET_USER_REPORT_DATA]
                @From_Date datetime,
                @To_Date datetime

            AS
            BEGIN


                Select * into #GetUserTable
                    from
                        (
                              select distinct a.N_UserMkey, b.mkey,   
                              ISNULL(b.first_name + ' ' , '') + ISNULL(b.last_name,'') NAME
                              from inward_doc_tracking_trl a ier join user_mst b on 
                              a.N_UserMkey = b.mkey 
                              where a.U_datetime between @From_Date and @To_Date    

                                select distinct a.mkey, b.ref_mkey from inward_doc_tracking_hdr a ier join
                                inward_doc_tracking_trl b on
                                a.mkey = b.ref_mkey
                                and a.U_datetime between @From_Date and @To_Date                                                                                      
                        ) as xx   


                    SELECT * FROM #GetUserTable
                    DROP TABLE #GetUserTable

    END