April 15 is the final day to pay owed income tax, but the agency can set up installment plans for people who can’t pay the full amount they owe at once. April 15 is also the last day for taxpayers to file a return or get an extension to Oct. 15 to submit their return.“As always, the IRS workforce remains vigilant and dedicated to their mission to serve the American taxpaying public. At the same time, IRS information systems have been updated to incorporate the new tax laws and are ready to efficiently and e ...