The data from your input stream is stored in a dataset, not a macro variable.
When you add an ampersand - &SSNList - you are referencing a macro variable, which in your case doesn't exist.
You can alter your code so that the filter selects all the contents of your dataset, SSNList.
One way is by editing your where statement with a subquery like:
WHERE t1.SSN IN (select [insert name of your SSN column from the input stream] from SSNList)
Don't forget to include the headers in your input stream, when you specify the range in Excel.
Alternately you can do it with a join:
FROM Test1.XXX_Address_VW t1 left join SSNList t2 on
t1.SSN=t2.[insert name of your SSN column from the input stream]
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