This is quick and dirty, but since the number of months in a year isn't going to change any time soon you can do this:

;With Invoice AS

(

SELECT '20130101' [InvoiceDate], 100 [InvoiceAmount] UNION ALL

SELECT '20120102', 101 UNION ALL

SELECT '20120202', 140 UNION ALL

SELECT '20120302', 130 UNION ALL

SELECT '20120402', 120 UNION ALL

SELECT '20120502', 110 UNION ALL

SELECT '20130102', 101 UNION ALL

SELECT '20130202', 140 UNION ALL

SELECT '20130302', 130 UNION ALL

SELECT '20130402', 120 UNION ALL

SELECT '20130502', 110 UNION ALL

SELECT '20130502', 111

)

SELECT *,ISNULL(jan,0) +

ISNULL(feb,0) +

ISNULL(mar,0) +

ISNULL(apr,0) +

ISNULL(may,0) +

ISNULL(jun,0) +

ISNULL(jul,0) +

ISNULL(aug,0) +

ISNULL(sep,0) +

ISNULL(oct,0) +

ISNULL(nov,0) +

ISNULL(dec,0) [YearToDate]

FROM (

SELECT

year(CONVERT(DATE,InvoiceDate)) as [year],left(datename(month,CONVERT(DATE,InvoiceDate)),3)as [month],

InvoiceAmount as Amount

FROM Invoice

) as s

PIVOT

(

SUM(Amount)

FOR [month] IN (jan, feb, mar, apr, may, jun, jul, aug, sep, oct, nov, dec)

)AS [pivot]