71.07(9)(b)4. 4. For taxable years beginning after December 31, 1998, and before January 1, 2000, subject to the limitations under this subsection a claimant may claim as a credit against, but not to exceed the amount of, taxes under s. 71.02, 8.4% of the first $0 of property taxes or rent constituting property taxes, or 8.4% of the first $0 of property taxes or rent constituting property taxes of a married person filing separately.

71.07(9)(b)5. 5. For taxable years beginning after December 31, 1999, subject to the limitations under this subsection a claimant may claim as a credit against, but not to exceed the amount of, taxes under s. 71.02, 12% of the first $2,500 of property taxes or rent constituting property taxes, or 12% of the first $1,250 of property taxes or rent constituting property taxes of a married person filing separately.

71.07(9)(c) (c) For an unmarried person or a married person filing a separate return who is a part-year resident of this state, the credit under this subsection is limited to that fraction of the amount determined under this subsection that Wisconsin adjusted gross income is of federal adjusted gross income. No credit is allowed under this subsection for unmarried persons or married persons filing separate returns who are nonresidents of this state. If one spouse is not domiciled in this state during the entire taxable year, the credit on a joint return is determined by multiplying the school property tax credit that would be available to them if both spouses were domiciled in this state during the entire taxable year by a fraction the numerator of which is their joint Wisconsin adjusted gross income and the denominator of which is their joint federal adjusted gross income. No credit is allowed under this subsection on a joint return if both spouses are nonresidents of this state.

71.07(9)(d) (d) No credit may be allowed under this subsection unless it is claimed within the period specified in s. 71.75 (2).

71.07(9)(e) (e) In any case in which a principal dwelling is rented by a person from another person under circumstances deemed by the department of revenue to be not at arm's length, the department may determine rent at arm's length, and, for purposes of this subsection, such determination shall be final.

71.07(9)(f) (f) The department of revenue, on its forms and instructions, shall refer to the credit under this subsection as the school property tax credit.

71.07(9e)(a)(a) For taxable years beginning before January 1, 1994, any natural person may credit against the tax imposed under s. 71.02 an amount equal to one of the following percentages of the federal basic earned income credit for which the person is eligible for the taxable year under section 32 (b) (1) (A) to (C) of the internal revenue code:

71.07(9e)(ac) (ac) For taxable years beginning after December 31, 1994, and before January 1, 1996, any natural person may credit against the tax imposed under s. 71.02 an amount equal to one of the following percentages of the federal basic earned income credit for which the person is eligible for the taxable year under section 32 (b) (1) (A) to (C) of the internal revenue code:

71.07(9e)(ad) (ad) For taxable years beginning after December 31, 1993, and before January 1, 1995, a person who has one qualifying child who has the same principal place of abode as the person may credit against the tax imposed under s. 71.02 an amount equal to the amount calculated by one of the following methods, based on the person's earned income or federal adjusted gross income:

71.07(9e)(ad)1. 1. If the person's federal adjusted gross income is below the phase-out income threshold under par. (at) and the person's earned income is the maximum credit income under par. (at) or less, the credit shall be the person's earned income multiplied by 1.15%.

71.07(9e)(ad)2. 2. If the person's federal adjusted gross income is below the phase-out income threshold under par. (at) and the person's earned income is more than the maximum credit income under par. (at) but not more than the phase-out income threshold, the credit shall be the maximum credit income multiplied by 1.15%.

71.07(9e)(ad)3. 3. If the person's federal adjusted gross income is below the phase-out income threshold under par. (at) and the person's earned income is more than the phase-out income threshold but not more than the maximum income under par. (at), the credit shall be the amount obtained by subtracting from the maximum credit under par. (at), the amount obtained by multiplying by 0.82%, the difference between the person's earned income and the phase-out income threshold.

71.07(9e)(ad)4. 4. If the person's federal adjusted gross income is at or above the phase-out income threshold under par. (at) but not more than the maximum income under par. (at), the credit shall be the lesser of one of the following:

71.07(9e)(ad)4.b. b. If the person's earned income is more than the maximum credit income under par. (at) but not more than the phase-out income threshold under par. (at), the maximum credit income multiplied by 1.15%.

71.07(9e)(ad)4.c. c. If the person's earned income is more than the phase-out income threshold under par. (at) but not more than the maximum income under par. (at), the amount obtained by subtracting from the maximum credit under par. (at), the amount obtained by multiplying by 0.82%, the difference between the person's earned income and the phase-out income threshold.

71.07(9e)(ad)4.d. d. The amount obtained by subtracting from the maximum credit under par. (at), the amount obtained by multiplying by 0.82%, the difference between the person's federal adjusted gross income and the phase-out income threshold under par. (at).

71.07(9e)(af) (af) For taxable years beginning after December 31, 1995, and before January 1, 2011, any natural person may credit against the tax imposed under s. 71.02 an amount equal to one of the following percentages of the federal basic earned income credit for which the person is eligible for the taxable year under section 32 (b) (1) (A) to (C) of the Internal Revenue Code:

71.07(9e)(ah) (ah) For taxable years beginning after December 31, 1993, and before January 1, 1995, a person who has 2 qualifying children who have the same principal place of abode as the person may credit against the tax imposed under s. 71.02 an amount equal to the amount calculated by one of the following methods, based on the person's earned income or federal adjusted gross income: