When Are State Tax Returns Due in Delaware?
Delaware is one of several states in which your state income tax return can be filed after April 15.
You probably already know that most Americans have to file their 2018 federal tax return by April 15, 2019 (as we told you earlier). For most states with an income tax (there are nine states with no income tax), the state return is also due on April 15 this year. However, some states give you more time to file — such as Delaware.
States With Tax Deadlines After April 15 in 2019
|New Mexico||April 30 (if e-filed)|
|Oklahoma||April 22 (if e-filed)|
Delaware residents get 15 extra days after the federal due date to file their state tax return because Form 200-01 isn't due until April 30, 2019.
If you can't file on time, you can get an extension to October 15, 2019, by submitting Delaware Form 200ES (1027) and paying any tax estimated to be due for the 2018 tax year no later than April 30, 2019.
We recommend filing both federal and state returns at the same time if possible. State returns typically "piggyback" off the federal return, so it's usually easier to do them at the same time. There's also a better chance of avoiding discrepancies if you do them together. However, if that's not possible, having an extra two weeks to file your Delaware return can help. It gives you more time to focus on getting your federal return off before the April 15 deadline and then to get your state return just right.
For information about other states with delayed tax filing deadlines, see 9 States Where You Can File Your State Tax Return After April 15.