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April 2- Electronically file Forms W-2, W-2G,1098, 1099, and 8027.
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April 4- Deposit payroll tax for payments on Mar 28-30 if the semiweekly deposit rule applies.
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April 6- Deposit payroll tax for payments on Mar 31-Apr 3 if the semiweekly deposit rule applies.
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April 10- Employers:Employees are required to report to you tips of $20 or more earned during March.
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April 11- Deposit payroll tax for payments on Apr 4-6 if the semiweekly deposit rule applies.
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April 13- Deposit payroll tax for payments on Apr 7-10 if the semiweekly deposit rule applies.
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April 17- Individuals: File 2011 Form 1040, 1040Aor 1040EZ. For automatic 6-month extension file Form 4868 and deposit estimated tax. Pay the first installment of 2012 estimated tax.
Partnerships: File 2011 Form 1065 and furnish a copy of Sch. K-1 to each partner.
Electing Large Partnerships: File 2011Form 1065 calendar year return. Household
Employers: File Sch. M withForm 1040 if you paid $1,700 or more to a household employee.
Corporations: Deposit the first installment of  your estimated tax for 2012.
Employers:Deposit payroll tax for Mar if the monthly deposit rule applies.
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April 19- Deposit payroll tax for payments on Apr 11-13 if the semiweekly deposit rule applies.
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April 20- Deposit payroll tax for payments on Apr 14-17 if the semiweekly deposit rule applies.
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April 25- Deposit payroll tax for payments on Apr 18-20 if the semiweekly deposit rule applies.
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April 27- Deposit payroll tax for payments on Apr 21-24 if the semiweekly deposit rule applies.
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April 30- File Form 720 for the first quarter of 2012.
File Form 730 and pay the tax on wagers accepted during March. File Form 2290 and pay the tax on vehicles first used in March. Employers: File Form 941 for the first quarter of 2012. Deposit FUTA tax owed through Mar if more than $500.
