TAX code

Hi All,

Kindly help me in the following situation.

We have a PO(created long back. 13/03/08) with payment term A for which the description was:

A: 3% rebate before 14 days

No rebate, after 14 days

base line date= document date

The TAX code used is 1( TAX 15 % which was valid till 31/08/2008)

But some lines of the PO was still open to be invoiced and when I tried to invoice on today's date (07/03/09) thru MIRO, I am facing the following situation:

TAX code showing as 2 in MIRO (TAX 17.5 % which is in place since 01/09/2008)

Payment term is showing A (same as PO)

Rebate is still calculated as 3% (i didnot understand why? as baseline date=doc date)

After checking the calculate TAX tab and making the necessary changes in amounts the green light is on(i can post the doc) when there is still a mismatch of 4 usd(which is zero usuallly) on net payable of 943 USD.

From where this 4 usd has come? doesnot it necessarily be 0 to post the doc?

Regards,