June

Th 15 Individuals living outside the U.S.: File Form 1040. For automatic 4 month extension file form 4868 and deposit estimated tax.

Th 15 Pay the second installment of 2017 estimated tax -Use Form 1040-ES.

Th 15 Corporations: Deposit the second installment of your 2017 estimated tax.

July

Mo 31 Deposit FUTA owed through June if more than $500.

Mo 31 File Form 941 for the second quarter.

August

Th 10 File Form 941 for the second quarter if you timely deposited all required payments.

September

Fr 15 Pay the third installment of your 2017 estimated tax – Use Form 1040-ES.

Fr 15 C corporations: Deposit the third installment of your 2017 estimated tax.

Fr 15 S Corporations: File Form 1120-S if you timely requested an extension – see Form 7004

Fr 15 Partnerships: File Form 1065 if you timely requested an extension – see Form 7004

Fr 15 Electing Large Partnerships: File Form 1065-B if you timely requested an extension.