The IRS will give last-minute filers additional time to file and pay their tax returns after the web page for paying their tax bills using their bank accounts crashed.
The page was operational again as of 5:05 p.m. ET on Tuesday — Tax Day — after being unavailable for most of the day.
The IRS apologized for the problem.
"This is the busiest tax day of the year, and the IRS apologizes for the inconvenience this system issue caused for taxpayers," acting IRS Commissioner David Kautter said in a statement.
The agency said individuals and businesses that were originally due to file Tuesday will now have until Wednesday night.
The outage affected the "Direct Pay" link, a free service for paying taxes via bank accounts, and the "Payment Plan" page, where filers can pay their tax bill in installments. Both pages are back online.