This document provides instructions for completing Arizona Form 140PY Schedule A(PYN) for itemized deductions. It explains that a part-year resident can deduct medical expenses, taxes, interest, charitable contributions, and casualty losses paid during the time they were a resident, as well as from Arizona sources during the time they were a nonresident. It includes a worksheet to calculate the percentage of deductions from Arizona sources to claim. The form must be completed after Schedule A of the federal 1040, and some deductions differ between federal and state returns.