Temp Table And Update

below is the complete code of two temp talbe , the first temp talbe i created so for others it is easy to see what fields I am copying into the temptable.

So what I am doing is that, copying the values from #RealTable into the #Rpt table. Later I want to check the values into the some column and than on certain condtions I am going to update the values. But the way I am doing is I am using the update statment to change the values, where as I think there must be a better way of doing what I am doing in these codes. So instead of using the updates like 6 times or more I can just use them maybe twice. Or probably not at all.
Please give your idea. Thanks.
Code is running and you can try.
I just depict a litttle code here but in real i have 30 columns and the data is coming from the complex join statments. And I am doin the updates for 8 times.



BEGIN
Create table #RealTable
(
LastName varchar (20)
,Phone varchar (20)
,MissingInfo varchar (100)
,ErrMessage varchar (255)
);




--
Insert INTO #RealTable Values('Abraham','917 250 9999', '1', 'Need More Paper')
Insert INTO #RealTable Values('Sar', '917 999 9999', '2', 'Need ID')
Insert INTO #RealTable Values('John', '732 888 8888', '3', 'Need More Paper')
Insert INTO #RealTable Values ('Sal', '555 555 5555', '4', 'Legal Documentation')


Create table #Rpt
(
LastName varchar(20)
,Phone varchar(20)
,MissingInfo varchar(20)
,ErrMessage varchar(255)
,TextMessage varchar(255)
,CheckMark varchar(1)

)
Insert INTO #Rpt
Select
LastName
,Phone
, MissingInfo
,ErrMessage
,'' AS TextMessage
,'' AS CheckMark
From #RealTable

Select * from #Rpt


--Now i saw the result which is what I have inserted.
--but I want to fill the values of the TextMessage and the CheckMark.
--So there could be a way to do what I am doing following.

Update #Rpt
Set TextMessage='Please send the signed copy'
Where MissingInfo='Need More Paper'

Update #Rpt
Set TextMessage='Send us photo copy of your ID'
Where MissingInfo='Need ID'

Update #Rpt
Set TextMessage='Send the legal copy of the document'
Where MissingInfo='Legal Documentation'

Update #Rpt
set CheckMark='a'
where MissingInfo in ('1','3','4') AND ErrMessage='Need More Paper'

Select * From #Rpt

END