For purposes of applying limitations on the deductions described in this section, any reference to “compensation” or “earned income” shall be a reference to the amount required to be used for purposes of limiting the deduction in computing federal income tax for the same taxable year.

1. (a) The deduction allowed by Section 219 of the Internal Revenue Code.
2. (b) The deductions allowed by Sections 162(l) and 404 of the Internal Revenue Code in the case of an individual who is an employee within the meaning of Section 401(c)(1) of the Internal Revenue Code.