Querying multiple tables
This will get you the Status Description:

SELECT s.SR_Service_RecID, SR_Status.Description, c.Company_Name, s.Last_Update, s.Date_Req
FROM SR_Service s 
    INNER JOIN Company c ON s.Company_RecID = c.Company_RecID
    INNER JOIN SR_Status ON s.ST_Status_RecID = SR_Status.SR_Status_RecID
WHERE SR_Type_RecID IN (SELECT t.SR_Type_RecID
                        FROM SR_Type t 
                        INNER JOIN SR_Board b
                            ON t.SR_Board_RecID = b.SR_Board_RecID
                        WHERE t.description LIKE @Type
                           AND b.Board_Name LIKE @Board)
AND s.SR_Status_RecID IN (SELECT SR_Status_RecID
                          FROM SR_Status
                          WHERE Closed_Flag = 0)


To add the schedule, you'd need to add a key field from the schedule table to the SR_Service table.