For another column, try this

SELECT DOC, PRODTYPE

,sum(CASE WHEN TERM = 1 THEN 1 ELSE 0 END) as 'YR'

,sum(CASE WHEN TERM = 12 THEN 1 ELSE 0 END) AS 'MTH'

,sum(CASE WHEN TERM IN (1,12) THEN 1 ELSE 0 END) as 'YRMTH'

From (table)

GROUP BY DOC, PRODTYPE

I'm not really sure why you're doing this with both case statements and with group by. Could you expose a small set of sample data and your desired results?