Whenever you start a new job - Complete the W-4, indicating how much will be withheld from your paycheck, December 31 - Last day of the calendar year, earnings are final after this date, January 1 - First day you can mail in federal and state paper tax forms, January 31 - Deadline for employers to mail W-2's to employees, April 15 - Last day to e-file or mail federal and state forms or to request an extension, October 15 - Deadline for filing federal and state returns that have received extensions,

Research the Tax Cycle

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