Tax Return Due Dates – 2018 Tax Year Returns
Individual 1040 returns: April 15th, 2019
Trust/ Estate 1041 returns: April 15th, 2019
Partnership returns Form 1065: March 15, 2019
S corporation returns Form 1120 S: March 15, 2019
C corporation returns Form 1120: April 15, 2019
For other tax return due dates and extension dates please look at the IRS Tax Calendar (Pub 509)