how to update 2 tables data in single event.....?

CREATE PROCEDURE [sp_UpdateGRN] 
(
    @parameter1 nvarchar,
    @parameter2 nvarchar,
    .
    .
    .
    @parametern nvarchar,
)
AS 
BEGIN

	BEGIN TRANSACTION
	BEGIN TRY
		INSERT INTO [tblTransaction] 
			(Field1,Field2,......Fieldn) 
		VALUES 
			(@parameter1,@parameter2,......@parametern)

		INSERT INTO [tblStock] 
			(Field1,Field2,......Fieldn) 
		VALUES 
			(@parameter1,@parameter2,......@parametern)
        COMMIT TRANSACTION
	END TRY
	BEGIN CATCH
		ROLLBACK TRANSACTION
		SELECT ERROR_NUMBER() AS ErrorNumber,ERROR_MESSAGE() AS ErrorMessage
	END CATCH
END