Individual and Corporate Tax Returns Due for Tax Year 2018
If you haven’t applied for an extension, e-file or postmark your individual tax returns by midnight April 15, 2019.

Individual and Corporate Tax Return Extension Form Due for Tax Year 2018
Need more time to prepare your tax return? File your request for a tax extension by April 15 to push your tax deadline back to October 15, 2019.

1st Quarter 2019 Estimated Tax Payment Due
If you are self-employed or have other first-quarter income that requires you to pay quarterly estimated taxes, get your Form 1040-ES postmarked by April 15, 2019 tax deadline.

Last Day to make a 2018 IRA Contribution
If you haven’t already funded your retirement account for 2018, do so by April 15, 2019. That’s the deadline for a contribution to a traditional IRA, deductible or not, and a Roth IRA. However, if you have a Keogh or SEP and you get a filing extension to October 15, 2019, you can wait until then to put 2018 money into those accounts.