April 15 tax deadline for filing a 2014 personal, partnership, or estates/trusts tax returns or extension. The return or extension must be postmarked or transmitted for e-filing by Wednesday, April 15, 2015. To avoid late payment penalties and interest, any additional taxes you owe must be paid by this date even if you file an extension. This is also the deadline for first installment of 2015 estimated tax payments for Corporations.
Individuals: File Form 1040, 1040A or 1040EZ. For automatic 6-month extension, file Form 4868 and deposit estimated tax.
Partnerships: File Form 1065 and furnish a copy of Schedule K-1 to each partner
Household Employers: File Schedule H with Form 1040 if you paid $1,900 or more to a household employee.