what all this means is that the $461 gets allocated in the same manner as interest expense on the original debt.
they're citing an IRS regulation that says debt refinancing gets allocated in the same manner as the original debt its deductibility depends on the activity of the partnership. That wasn't mentioned. it could be investment interest. it could be interest expense related to a passive or non-passive activity which would not be investment interest expense that would go to schedule A.
