Not to be confused with Yukon wolf. The northwestern wolf, Canis lupus occidentalis, also known as the Mackenzie Valley wolf or northern timber wolf is a subspecies of gray wolf in western North America. It ranges from the upper Mackenzie River Valley, southward into central Alberta.
The executor must file a federal income tax return (Form 1041) if the estate has: 1  gross income for the tax year of $600 or more, or. 2  a beneficiary who is a nonresident alien.
To file your back tax returns, you will need the W-2s or 1099 forms you received for those tax years to report your income. If you are eligible for deductions and credits, you must also gather any receipts or other supporting records that prove your eligibility to claim them.