Americans are getting an extra day to file their taxes after key elements of the IRS website crashed on deadline day. The IRS said that individuals or businesses with a filing or payment due Tuesday now have until midnight Wednesday to complete the task. Earlier Tuesday, Americans who had waited until the final day to file online got an unwelcome surprise: The agency’s website for making payments and gaining access to other key services was down due to what Treasury Secretary Steven Mnuchin later described as a “high-volume technical issue.” The website was back online late Tuesday. “This is the...