The amount of money he owes to the IRS will impact the garnishment and they may reduce it depending on the child support obligation that he has to you.
If you are fearful that he may take your daughter to another country you can get a court order preventing him from leaving the country. If you seek this type of order a Judge will determine how likely they think it is that they believe he would actually leave. If he is a good father, it is unlikely that a court would only grant him supervised visitation.
The pre marital agreement dealing with custody is not enforceable and would not be considered by the court.
Your questions are very specific, I would advise you to set up an initial consultation so that they can answer the questions specific to your case.
Helena M. Nevicosi
Attorney with Rosen Law Firm
4101 Lake Boone Trail, Suite 500
Raleigh, North Carolina 27607
919.787.6668 main phone
919.256.1665 direct fax
10925 David Taylor Drive, Suite 100
Charlotte, North Carolina 28262
704.644.2831 main voice
704.307.4595 main fax
1829 East Franklin Street, Bldg 600
Chapel Hill, NC 27514
919.321.0780 main phone
919.787.6668 main fax
The response posted above is based upon the limited factual information made available and is not intended as a full and complete response to the question. The only reliable manner to obtain complete and adequate legal advice is to consult with an attorney, fully explain your situation, and allow the attorney sufficient opportunity to research the applicable law and facts required to render an accurate opinion. The basic information provided above is intended as a public service but a full discussion with an attorney should be undertaken before taking any action.