This day is determined by the IRS in early January. This is the first day that the IRS will accept electronic and paper returns. This day usually falls between the last week of January and the first week of February.
Important for Business Owners
Employers are required by Federal Law to send their employees a copy of their W-2 statements for the previous year before January 31st of the following year. Employers are also required to send a copy of these W-2 statements to the IRS
This is the last day to file your taxes without having to file for an extension. If you owe money to the IRS then even if you file for an extension you still need to try to pay the IRS some or all of the money you owe before April 15th
If you filed for an extension then this is the last day to file. An extension is only an extension on having to file your taxes. If you think or know that you will owe the IRS money then you should try to pay some of all of your balance to the IRS before Tax Day (April 18th) to avoid interest and penalties.