Individuals: Pay the final installment of your 2014 estimated tax. Use Form 1040-ES. Calendar Add to Calendar Add to Timely Calendar Add to Google Add to Outlook Add to Apple Calendar Add to other calendar Export to XML When: January 15, 2015 all-day 2015-01-15T00:00:00-08:00 2015-01-16T00:00:00-08:00 ← Deposit payroll tax for payments on Jan 24-27 if the semiweekly deposit rule applies.Deposit payroll tax for payments on Jan 12-15 if the semiweekly deposit rule applies. →