May 31st is the deadline to file the schedule called "Economic Data for Portfolio Concerns" contained on page 22 of SBA Form 468 (Long Form).
May 15th is the deadline for all calendar year exempt organizations to file Forms 990, 990-PF, and 990-T.
You may file a 5-month extension.
File Form 941 for the first quarter of 2013. This due date applies for calendar year taxpayers and only if you deposited the tax for the quarter in full and on time.
Note: If you are a Fiscal Year Taxpayer, you should calculate your quarterly due dates based on your fiscal year end date.
May 1st is the required annual participating securities distribution date.
April 30th is the deadline to file the Notification of Material Valuation Changes (quarterly notification; changes of +/- 20% since last valuation report).
April 30th is the deadline to file SBA Form 468 (Short Form). An electronic copy must be filed and two certified copies must be delivered to the SBA.
Partnerships: File 2012 Form 1065 and furnish a copy of Schedule K-1 to each partner. For automatic 5-month extension, file Form 7004.
March 31st is the deadline to file the Notificiation of Material Valuation Changes (semiannual notification; changes of +/- 10% since last valuation report.
March 31st is the deadline to file SBA Form 1031A (Semi-Annual 1031 Certification).
Individuals: File 2012 Form 1040, 1040A, or 1040EZ. For automatic 6-month extension file Form 4868 and deposit estimated tax. Pay the first installment of 2013 estimated tax.
Household Employers: File Schedule H with Form 1040 if you paid $1,700 or more to a household employee.
Partnerships: File 2012 Form 1065 and furnish a copy of Sch. K-1 to each partner.
Electing Large Partnerships: File 2012 Form 1065 calendar year return.
Corporations: Deposit the first installment of your estimated tax for 2013.
Employers: Deposit payroll tax for March if the monthly deposit rule applies.
