In 2015, the Surface Transportation and Veterans Health Care Choice Improvement Act of 2015 (the Act) was enacted and included a number of tax changes. The key change was to the due date of various business and fiduciary returns in 2017 for 2016 tax returns.

The deadline for filing calendar year 2018 partnerships and S corporations is March 15, 2018. These returns must be filed (e-filed or postmarked) by midnight on March 15, 2018. Fiscal year returns will be due the 15th day of the 3rd month following the year-end.

Both partnership and S corporation returns are allowed a six-month extension if needed. Payment must accompany the return or extension if there are taxes due. An extension of time to file does not extend the time to pay taxes that are due.

The due date for C corporations was also changed and is now due on the 15th day of the 4thmonth. Calendar year returns will be due on April 17, 2018.

In 2017 the IRS issued Notice 2017-47 which allowed for relief of those tax returns not filed timely due to the change in the due dates for partnership returns. Such relief is not expected for the 2017 returns due in 2018 and extensions should be filed on or before March 15th for timely filing of the partnership returns.