Due to system issues, the IRS has announced a one day extension of time to file. Individuals and businesses with a filing or payment due date of April 17 will now have until midnight on Wednesday, April 18. Taxpayers do not need to do anything to receive this extra time.
Full Article: https://www.irs.gov/newsroom/irs-provides-additional-day-to-file-and-pay-for-taxpayers-through-wednesday-april-18-irs-processing-systems-back-online