EBTAX and AP Invoice Tax Lines for $0

Hi All,

We have a requirement to have a $0 amount on an AP Invoice Line and key in Invoice distributions accordingly for this tax line.

Is this not allowed in r12?

In our 11i instance, we would have a tax invoice distributions for a negative amount and another tax invoice distributions for a postive amount.

In r12, I am told that there can only be once "TAX" AP invoice line.  In such case, what would be an appropriate way to replicate the above situation that is being done in 11i/?

I am getting "unexpected error while tax calculation" when I try to navigate to the invoice distributions for a $0 tax line. Why? is this a bug?