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.
Determining whether a senior citizen needs to file a tax return can be complex. The IRS provides a chart in Publication 575 to assist taxpayers. Self-employment income, subject to its own tax, may require a senior citizen to file even though the income is fairly low. Seniors who are not sure if they have to file a tax return should contact the IRS or a tax professional for help.