Show data from last 12 months from current (today) date in SQL Server

Hello everyone,  I want to create a chart in vb.net that shows the cost of my expenses for the last 12 months for each month how much I have spent to be shown.

I want that it goes with my pc time, so if we have no December I want the chart to automatically show me the cost for 12 months.

SELECT Sum(Price) As Total,
      DATEPART(MM, Date) As [year],
      Sum (CONVERT(INT, CONVERT(VARCHAR(MAX),quantity))) as Lesh
FROM dbo.Expenses
WHERE date >=DATEADD(month,-12,DATEADD(day,DATEDIFF(day,0,GETDATE()),0)) AND date <=DATEADD(day,DATEDIFF(day,0,GETDATE()),0)
GROUP BY  DATEPART(MM, Date)

Thank you very kindly,

Elvis