2018-12-31 Deadline for 401(k) contributions. Deadline for 401(k) contributions. December 31, 2018 Deadline for 401(k) contributions.
2019-01-15 Fourth-quarter 2018 estimated tax payments are due. Fourth-quarter 2018 estimated tax payments are due. January 15, 2019 Fourth-quarter 2018 estimated tax payments are due.
2019-01-31 W-2 employer delivery to employee deadline. W-2 employer delivery to employee deadline. January 31, 2019 W-2 employer delivery to employee deadline.