creating Tax Only Line through Interface?

Hi,

We are trying to create an Invoice with two ITEM lines without Tax code and a TAX line with a tax code and an amount through the Interface.

here we don't know which ITEM lines are Taxed (i.e. just ITEM line-1 might be contributed full tax amount, we won't know that in interface file), so in this scenario Oracle suggested to use Tax Only Line, so that system will not validate the Tax line against Item lines.

Any idea how to create Tax Only Line through Interface? what attributes determine a Tax line as Tax Only Line?

Rgds,