Definition of a qualifying child
                               
                            
                           
                         
                        Section 151 allows a taxpayer a deduction of the exemption amount for
                           each individual who is a dependent (as defined in § 152) of the
                           taxpayer for the taxable year.  Under § 152(a), a dependent is a
                           qualifying child or qualifying relative.
                        
                        Section 152(c)(1) defines a qualifying child as an individual who (A)
                           bears a certain relationship to the taxpayer (child, brother, sister, stepbrother,
                           stepsister or descendant of any of those relatives), (B) has the same principal
                           place of abode as the taxpayer for more than one-half of the taxable year,
                           (C) meets certain age requirements, and (D) does not provide over one-half
                           of the child’s own support for the calendar year in which the taxable
                           year of the taxpayer begins.
                        
                        WFTRA establishes a uniform definition of a qualifying child under § 152(c)
                           for determining whether a taxpayer qualifies for head of household filing
                           status, the child and dependent care credit, the child tax credit, the earned
                           income credit, and the dependency deduction. See §§ 2(b)(1)(A)(i),
                           21(b)(1)(A), 24(c), 32(c)(3), and 151, respectively, and H.R. Conf. Rep. No.
                           696, 108th Cong., 2d Sess. 55-65 (2004).  The uniform
                           definition also applies in determining whether a taxpayer qualifies for the
                           income exclusion under § 129, which defines dependent care assistance
                           by reference to employment-related expenses (as defined in § 21(b)(2))
                           for the care of a qualifying child or other qualifying individual.
                        
                      
                     
                        
                        Section 152(c)(4) provides a tie-breaking rule for determining which
                           taxpayer may claim a qualifying child as a qualifying child when two or more
                           taxpayers claim the same child for a taxable year beginning in the same calendar
                           year.  The general rule of § 152(c)(4)(A) applies if one or no taxpayer
                           claiming the child is the child’s parent.  Under § 152(c)(4)(A),
                           the child is treated as the qualifying child of (i) the taxpayer who is the
                           child’s parent, or (ii) if none of the taxpayers is the child’s
                           parent, the taxpayer with the highest adjusted gross income for that taxable
                           year.
                        
                        The rule of § 152(c)(4)(B) applies if both taxpayers claiming
                           the child as a qualifying child are the child’s parents who do not file
                           a joint return together.  Under § 152(c)(4)(B), the child is treated
                           as the qualifying child of the parent with whom the child resides for the
                           longer period of time during the taxable year.  If the child resides with
                           both parents for the same amount of time during the taxable year, the child
                           is treated as the qualifying child of the parent with the higher adjusted
                           gross income for that taxable year.
                        
                      
                     
                        
                           
                              
                                 Special rule for certain noncustodial parents
                               
                            
                           
                         
                        Notwithstanding the rule of §152(c)(4)(B), a child may be treated
                           as the qualifying child of the noncustodial parent, for certain purposes,
                           under the special rule of § 152(e).  The noncustodial parent may
                           claim the child as a qualifying child under § 152(e), if:
                        
                        (1) the child is in the custody of one or both parents for more than
                           one-half of the calendar year;
                        
                        (2) the child receives over one-half of the child’s support during
                           the calendar year from the child’s parents;
                        
                        (3) the parents—
                        (a) are divorced or separated under a decree of divorce or separate
                           maintenance,
                        
                        (b) are separated under a written separation agreement, or
                        (c) live apart at all times during the last 6 months of the calendar
                           year; and
                        
                        (4) the custodial parent releases the claim to the exemption to the
                           noncustodial parent in a written declaration that the noncustodial parent
                           attaches to the noncustodial parent’s tax return.
                        
                        Section 152(e)(4) defines “custodial parent” as the parent
                           having custody of the child for the greater portion of the calendar year,
                           and “noncustodial parent” as the parent who is not the custodial
                           parent.
                        
                        The special rule of § 152(e) allows a noncustodial parent
                           to claim the child as a qualifying child only for purposes of the child tax
                           credit under § 24 and the dependency deduction under § 151.
                            Section 152(e) does not apply to determinations under §§ 2(b),
                           21(b) and 129 (see  § 21(e)(5)), and 32(c)(3).
                        
                      
                   
                  
                     
                     In the examples below, each individual is a citizen of the United States
                        and uses a calendar taxable year, and the child is a qualifying child (as
                        defined in § 152(c)) of each taxpayer.  Unless otherwise indicated,
                        these examples assume that each individual meets the other requirements for
                        claiming a benefit described in the example.
                     
                     Example 1.  (i) A child, mother, and grandmother
                        share the same principal place of abode.  The mother is not married and is
                        not the qualifying child of the grandmother, and the grandmother is not the
                        mother’s dependent.
                     
                     (ii) The mother claims the child as a qualifying child for purposes
                        of the earned income credit under § 32.
                     
                     (iii) The child is treated as the qualifying child of the mother for
                        purposes of the earned income credit.  Because the mother claims the child
                        as a qualifying child for purposes of the earned income credit, under § 152(c)(4)(A),
                        the child may not be treated as the qualifying child of the grandmother for
                        any purpose.
                     
                     (iv) If, however, the mother does not claim the child as a qualifying
                        child for any purpose, the child may be treated as the qualifying child of
                        the grandmother for purposes of the earned income credit under § 32
                        as well as head of household filing status under § 2(b), the dependency
                        deduction under § 151, the child tax credit under § 24,
                        the child and dependent care credit under § 21, and the exclusion
                        from income for dependent care assistance under § 129, if applicable,
                        assuming that no other taxpayer claims the child as a qualifying child.
                     
                     Example 2.  (i) The facts are the same as in Example
                              1, except that the mother and father of the child are divorced,
                        the father is the noncustodial parent, the mother has released the claim to
                        the exemption to the father in a written declaration under § 152(e),
                        and the father attaches the written declaration to his return and claims the
                        child as a qualifying child for purposes of the dependency deduction and the
                        child tax credit.
                     
                     (ii)  Under § 152(e), the child is treated as the qualifying
                        child of the father for purposes of the dependency deduction and the child
                        tax credit.  The child is treated as the qualifying child of the mother for
                        purposes of the earned income credit and, if applicable, head of household
                        filing status, the child and dependent care credit, and the exclusion from
                        income for dependent care assistance.  The child may not be treated as the
                        qualifying child of the grandmother for any purpose.
                     
                     Example 3.  (i) The father and mother of a child
                        are married to each other.  The father, mother, and child share the same principal
                        place of abode for the first 8 months of the year.  For the last 4 months
                        of the year, the parents live apart from each other, and the mother and child
                        share the same principal place of abode.  The parents file separate tax returns
                        for the taxable year.  Consequently, neither parent may claim head of household
                        filing status, an earned income credit, or a child and dependent care credit,
                        because in general § 2(b) applies only to unmarried individuals,
                        while §§ 32(d) and 21(e)(2), respectively, require married
                        individuals to file a joint return. 	
                     
                     (ii) The father claims the child as a qualifying child for purposes
                        of the dependency deduction under § 151 and the exclusion for dependent
                        care assistance under § 129.  The mother claims the child as a qualifying
                        child for purposes of the dependency deduction under § 151, the
                        child tax credit under § 24, and the exclusion for dependent care
                        assistance under § 129.
                     
                     (iii) Under the tie-breaking rule of § 152(c)(4)(B), the child
                        is treated as the qualifying child of the mother because the child resided
                        with the mother for the longer period of time during the taxable year.  Therefore,
                        the child is the qualifying child of the mother for purposes of the dependency
                        deduction, the child tax credit, and the exclusion for dependent care assistance.
                         Section 152(e) does not apply because the mother and father are not divorced
                        or separated under a decree of separate maintenance or written separation
                        agreement at the end of the taxable year and did not live apart for the last
                        6 months of the calendar year.  Therefore, the child may not be treated as
                        the qualifying child of the father for any purpose.
                     
                     (iv) If, however, the mother does not claim the child as a qualifying
                        child for any purpose, the child is treated as the qualifying child of the
                        father for purposes of the dependency deduction under § 151 and
                        the exclusion for dependent care assistance under § 129.
                     
                     Example 4.  (i) The facts are the same as in Example
                              3, except that the mother and father are separated under a written
                        separation agreement at the end of the taxable year, the mother is the custodial
                        parent and has released the claim to the exemption to the father in a written
                        declaration under § 152(e), and the father attaches the Form 8332
                        to his return and claims the child as a qualifying child for purposes of the
                        dependency deduction, the child tax credit, and the exclusion for dependent
                        care assistance under § 129.
                     
                     (ii)  Because § 152(e) applies, the child is treated as the
                        qualifying child of the father for purposes of the dependency deduction and
                        the child tax credit.  The child is not treated as the qualifying child of
                        the father for purposes of the exclusion for dependent care assistance because
                        the father is the noncustodial parent and, under § 21(e)(5), only
                        the custodial parent may claim the child as a qualifying child for purposes
                        of the exclusion for dependent care assistance.  Therefore, the tie-breaking
                        rule of § 152(c)(4)(B) applies, and the child is treated as the
                        qualifying child of the mother for purposes of the exclusion for dependent
                        care assistance.
                     
                     Example 5.  (i) The father and mother of two children
                        are married to each other.  The father, mother, and both children share the
                        same principal place of abode for the entire year.  The father and mother
                        file separate tax returns for the taxable year.  Consequently, neither parent
                        may claim head of household filing status, an earned income credit, or a child
                        and dependent care credit, because in general § 2(b) applies only
                        to unmarried individuals, while §§ 32(d) and 21(e)(2), respectively,
                        require married individuals to file a joint return.
                     
                     (ii) The father claims the older child as a qualifying child for purposes
                        of the child tax credit, dependency deduction, and exclusion for dependent
                        care assistance.  The mother claims the younger child as a qualifying child
                        for purposes of the child tax credit, dependency deduction, and exclusion
                        for dependent care assistance.
                     
                     (iii) The older child is treated as the qualifying child of the father
                        and the younger child is treated as the qualifying child of the mother.  The
                        tie-breaking rule of § 152(c)(4)(B) does not apply because no two
                        taxpayers are claiming the same child as a qualifying child for any of the
                        benefits.