Invoices by Month HELP....

Question

I am at a total loss... I am trying to create a custom query that I think is way over my head! Can any of you help me figure out how to do this?
The execs want a report to show the following columns:
Customer #
Customer Name
Invoice Number
Document Type
Invoice Date
Gross Amount
Breakdown  gross amount by base amount, tax amount, retention amount
The GL Account associated to the revenue
This would be broken down for current month.
I just have no idea to where to even begin....

Answer 1

Here is my query now... Please note that I am also hitting our prject management tables to get a few pieces of the information. When I add your pice to it H2, I do not get anything, just "No data found". All of the Data is now opulling correctly and I have no complaints about that, just cant seem to get this to work where I can make it selectable by month/year.
Any thoughts?
SELECT     (SELECT     TOP (1) Projektnummer
                       FROM          P4100_PM.dbo.MPProjektstamm
                       WHERE      (Kostentraeger =
                                                  (SELECT     TOP (1) Project
                                                    FROM          JDT1
                                                    WHERE      (TransId = l.TransId) AND (ISNULL(Project, N'') <> '')))) AS 'Project Number',
                          (SELECT     TOP (1) Projektname
                            FROM          P4100_PM.dbo.MPProjektstamm AS MPProjektstamm_2
                            WHERE      (Kostentraeger =
                                                       (SELECT     TOP (1) Project
                                                         FROM          JDT1 AS JDT1_2
                                                         WHERE      (TransId = l.TransId) AND (ISNULL(Project, N'') <> '')))) AS 'Project Name', OCRD.CardCode AS 'Customer Code',
                      OCRD.CardName AS 'Customer Name',
                          (SELECT     Personenname
                            FROM          P4100_PM.dbo.MPPersonenstamm
                            WHERE      (Personalnummer =
                                                       (SELECT     Personalnummer
                                                         FROM          P4100_PM.dbo.MPProjektstammProjektleiter
                                                         WHERE      (ProjektleiterTyp = 1) AND (Projektnummer =
                                                                                (SELECT     TOP (1) Projektnummer
                                                                                FROM          P4100_PM.dbo.MPProjektstamm AS MPProjektstamm_1
                                                                                WHERE      (Kostentraeger =
                                                                                (SELECT     TOP (1) Project
                                                                                FROM          JDT1 AS JDT1_1
                                                                                WHERE      (TransId = l.TransId) AND (ISNULL(Project, N'') <> '')))))))) AS 'Project Manager',
                      j.BaseRef AS 'Doc. No.', CASE l.transtype WHEN '13' THEN 'Invoice' WHEN '14' THEN 'AR CN' WHEN '24' THEN 'INCOMING' ELSE 'Other' END AS 'Type',
                       INV1.LineNum AS 'Line #', CONVERT(VARCHAR(10), l.TaxDate, 103) AS 'Doc Date', INV1.LineTotal AS [Base Amount], INV1.VatSum AS [Tax Amount],
                      OINV.DocTotal - OINV.PaidToDate AS [Retention Open Amount], OINV.DocTotal
FROM         INV1 INNER JOIN
                      OINV ON INV1.DocEntry = OINV.DocEntry RIGHT OUTER JOIN
                      JDT1 AS l INNER JOIN
                      OJDT AS j ON j.TransId = l.TransId INNER JOIN
                      OCRD ON l.ShortName = OCRD.CardCode ON OINV.TransId = l.TransId
WHERE     (OCRD.CardType = 'c') AND (l.IntrnMatch = '0') AND (DATEDIFF(MM, l.TaxDate, GETDATE()) = 0) AND
                          ((SELECT     TOP (1) Projektnummer
                              FROM         P4100_PM.dbo.MPProjektstamm AS MPProjektstamm_3
                              WHERE     (Kostentraeger =
                                                        (SELECT     TOP (1) Project
                                                          FROM          JDT1 AS JDT1_3
                                                          WHERE      (TransId = l.TransId) AND (ISNULL(Project, N'') <> '')))) LIKE '1%')
ORDER BY 'Project Number', 'Project Manager', 'Customer Code', 'Customer Name', l.TaxDate, 'Doc. No.'