January

 15^th – 4^th Quarter Estimated Tax Voucher

 30^th – Final extension for first year expatriates

 30^th – W2 distribution due date

February

March

 15^th – 1120 Corporate Individual Income Tax Return

 15^th – 7004 Application for Corp Extension

April

 15^th – 1040 Individual Income Tax Return

 15^th – 4868 Application for Automatic Extension

 15^th – 1^st Quarter Estimated Tax Voucher

 15^th – last day to make prior year IRA & SEP contributions

May

June

 15^th – Extended due date for Expatriates living abroad on April 15^th

 15^th – 2^nd Quarter Estimated Tax Voucher

July

August

September

October

November

December

15^th – 1040 Extended Due Date

 15^th – 2688 Application for Additional Extension

15^th – 3^rd Quarter Estimated Tax Voucher

 15^th – Extended Corp due Date

15^th – Final extended due date

31^st – Last day to make state estimated payments for current year federal deduction