The reimbursement system is set up in such a way that all states tax settlements
are consolidated into one. If the UN overpaid your New York State estimated tax
but owes you tax on New Jersey , depending on the situation, one of the two
following scenarios will happen.
Case 1. UN overpaid New York $1,000 and owed staff member US$300 for New Jersey
The net amount of US$700 ($1,000 less $300) will be applied to next year's New
York State advance.
Case 2. UN overpaid New York US$400 and owed staff member $1,000 for New Jersey
The net amount of US$600 ($1,000 less $400) will be settled with a check payable
to the staff member.