File Forms 1096, 1098, 1099 (except Form 1099-MISC reporting non-employee compensation), and W-2G if you file paper forms.

File Form 8027 if you are a large food or beverage establishment.

Deposit payroll tax for payments on Feb 21-23 if the semiweekly deposit rule applies.

File Form 2290 and pay the tax for vehicles first used in January.

File a new Form W-4 if you claimed exemption from income tax withholding in 2017 (see Publication 15 for details).

Begin withholding on employees who claimed exemption from withholding in 2017 but did not file a W-4 to continue withholding exemption in 2018 (see Pub 15 for details).

File Form 730 and pay the tax on wagers accepted during January.

File paper Forms 1094-C and 1095-C with IRS if you are an Applicable Large Employer; For all other providers file paper Forms 1094-B and 1095-B with the IRS

Farmers and fishermen: File Form 1040 and pay any tax due. However, you have until Apr 17 to file if you paid your 2017 estimated tax payments by Jan 16, 2018.

Deposit payroll tax for payments on Feb 24-27 if the semiweekly deposit rule applies.

Deposit payroll tax for payments on Feb 28-Mar 2 if the semiweekly deposit rule applies.

Deposit payroll tax for payments on Mar 3-6 if the semiweekly deposit rule applies.

Employers: Employees are required to report to you tips of $20 or more earned during February.

Deposit payroll tax for payments on Mar 7-9 if the semiweekly deposit rule applies.

Partnerships: File Form 1065 and furnish a copy of Sch. K-1 to each partner. For automatic 6-month extension, file Form 7004.

Electing Large Partnerships: File Form 1065-B calendar year return. Furnish Sch. K-1 to each partner. For automatic 6-month extension File Form 7004.

S Corps: File Form 1120S for calendar year & pay any tax due. Furnish copy of Sch. K-1 to each shareholder. For automatic 6-month extension, file Form 7004 & deposit estimated tax. File Form 2553 to elect S Corp status beginning with calendar year 2018.

Deposit payroll tax for Feb if the monthly deposit rule applies.

Deposit payroll tax for payments on Mar 10-13 if the semiweekly deposit rule applies.

Deposit payroll tax for payments on Mar 14-16 if the semiweekly deposit rule applies.

Deposit payroll tax for payments on Mar 17-20 if the semiweekly deposit rule applies.

Deposit payroll tax for payments on Mar 21-23 if the semiweekly deposit rule applies.

Deposit payroll tax for payments on Mar 24-27 if the semiweekly deposit rule applies.