55 Pa. Code § 140.604
(b) Calculation of premium.
(3) The medical and dental expenses reported on the custodial parent’s Federal Income Tax Return of the previous calendar year are allowable deductions from the income of the custodial parent as specified in paragraph (2).
(ii) If the Federal Income Tax Return of the previous calendar year is not available or there is a decrease in income from the previous calendar year, any of the following items may be used to verify current income:
(d) Premium payment or hardship waiver.