Form 8689, both lines 16 & 35 are negative and line 39 is zero. What number to enter on line 40?

As a US citizen residing in Virginia, I'm required to complete Form 8689 for my US Virgin Islands condo rental net income.  What value should I report on Form 8689, line 41 & 42? And, if line 42 is a refund, does the refund come from USVI authorities, OR refund from my 1040 US tax filing? 

 

Here are the entries:

> Net income loss on line 11 is ($8,116) after expenses.

> Line 29 is also ($8,116).

> Line 30 is +$21.

> Line 31 is +$5,185.

> Line 32 is ($5,164)

> Line 33 (from 1040, line 8b) is ($14,007).

> Line 34 calcs to 0.579; (math: line 29 divided by line 33)

> Line 35 calcs to ($2,990); math: line 32 multiplied by line 34

> Line 39 is zero.