nope. and if both parents do the IRS will audit both of them.
if its not in divorce papers or a court order, it comes down to who pays more then 50% of the childs expenses (child support does not, btw) and the parent with the living expense reciepts wins.
http://www.divorcelawinfo.com/states.htm
http://www.divorcehq.com/spprtgroups.html
http://www.divorceinfo.com/statebystate.htm
http://www.divorcenet.com/states
http://www.divorcesource.com/
http://www.divorcecentral.com/
http://www.divorcelawinfo.com/calculators.htm
http://www.helpyourselfdivorce.com/child-support-calculators.html
http://family.findlaw.com/
http://www.divorcehq.com/deadbeat.html
http://www.divorceinfo.com/
http://www.divorceinanutshell.com/
http://www.lawchek.com/Library1/_books/domestic/qanda/childsupp.htm
http://family.findlaw.com/child-support/support-laws/state-child-/
http://www.supportguidelines.com/resources.html
http://www.supportguidelines.com/articles/news.html
http://family.findlaw.com/child-support/support-basics/
http://www.ncsea.org/
http://www.nfja.org/index.shtml
FACTS AND REGIONAL FEDERAL CS OFFICE INFO
http://www.acf.dhhs.gov/opa/fact_sheets/cse_factsheet.html
http://www.acf.hhs.gov/programs/cse/newhire/fop/passport.htm
http://www.acf.hhs.gov/programs/cse/newhire/fop/fop.htm
http://www.acf.hhs.gov/programs/cse/newhire/faq/faq.htm
http://www.acf.hhs.gov/programs/oro/regions/acf_regions.html
http://www.acf.dhhs.gov/programs/cse/extinf.html
http://www.acf.dhhs.gov/programs/cse/
http://www.acf.dhhs.gov/grants/grants_cse.html
http://www.acf.dhhs.gov/index.html
http://www.acf.hhs.gov/programs/region2/index.html
http://www.fms.treas.gov/faq/offsets_childsupport.html
http://www.govbenefits.gov/govbenefits_en.portal
http://www.fedstats.gov/qf/
http://www.fedworld.gov/gov-links.html
FIND YOUR STATE REPS
http://www.usa.gov/
http://www.usa.gov/Agencies/State_and_Territories.shtml
http://www.nga.org
http://www.naag.org/attorneys_general.php
CHILD SUPPORT LIEN NETWORK
(some states work with them)
http://www.childsupportliens.com/
COLLECTORS
http://www.supportkids.com/
http://www.supportcollectors.com/faq.php
TAX INFO
http://www.taxsites.com/index.htm
http://www.divorceinfo.com/taxes.htm
http://www.irs.gov/taxtopics/tc354.html
http://www.irs.gov/taxtopics/tc422.html
http://www.irs.gov/faqs/faq4-5.html
http://www.irs.gov/localcontacts/index.html
http://www.irs.gov/advocate/index.html
http://www.irs.gov/publications/p525/index.html
http://www.fms.treas.gov/faq/offsets_childsupport.html