Split amount in MIRO

Hi,

When i use the transaction MIRO, under basic data, there is an option to enter the invoice amount. When tax is calculated, i believe it is calculated on this amount. Now if i have a PO with one line item of amount say 1200, is it possible to split this amount into two say 1000 and 200 and apply tax via different tax codes, keeping in mind that there is only one line item. If there is a solution to this please keep me posted.

Thanks in advance.