Due Date:
April 15

First Extension:
4 Months (August 15)
Form 4868

Second Extension:
2 Months (October 15)
Form 2688

Due Date:
15th Day of the 4th Month after year end

First Extension:
3 Months
Form 8736

Second Extension:
3 Months
Form 8800

Due Date:
15th Day of the 3rd Month after year end

First Extension:
6 Months
Form 7004

Second Extension:
N/A

Due Date:
15th Day of the 3rd Month after year end

First Extension:
6 Months
Form 7004

Second Extension:
N/A

Due Date:
15th Day of the 4th Month after year end

First Extension:
3 Months
Form 2758
Form 8736

Second Extension:
3 Months
Form 2758
Form 8800

Due Date:
9 Months after date of death

First Extension:
6 Months
Form 4768

Second Extension:
N/A

Due Date:
April 15th following year of gift

First Extension:
4 Months
Form 4868

Second Extension:
2 Months
Form 2688

Due Date:
15th Day of the 5th Month after year end

First Extension:
3 Months
Form 8868

Second Extension:
3 Months
Form 2758

Due Date:
Last Day of the 7th Month after year end

First Extension:
2 1/2 Months
Form 5558
Or the due date of the Federal Income Tax Return of the Employer.

Second Extension:
N/A