"Taxpayers themselves will need to print out returns from their TurboTax or whatever tax software they're using, sign them, and get them into the mail".
The IRS' website for making payments and gaining access to other key services temporarily crashed Tuesday amid the filing flood.
Kudlow said he wasn't aware of the nature of the issue, but said: "The IRS'll straighten it out".
On Tuesday morning, U.S. Sen. The agency said that past year, about five million taxpayers filed their returns on the last day of the filing season.
"If we can't solve it today we'll figure out a solution", he told the panel.
"A number of IRS systems are unavailable at the moment", said Acting IRS Commissioner David Kautter. Both options provide taxpayers with answers to specific questions about tax returns and the department's electronic filing, or e-filing, options. "We are working this as a priority".
Those who have procrastinated filing their taxes until the last minute can rest a little easy - for 24 hours, that is. "Taxpayers would not be penalized because of a technical problem the IRS is having".
Trump's top economic adviser Larry Kudlow offered a deadpan reaction when asked about the failure. "It sounds disgusting. It sounds really bad".
The IRS said Tuesday's tax trouble is the result of a hardware problem. "I hope it gets fixed".
"We will send them as normal".
H&R Block said it will continue to accept returns from filers.
TRENTON, N.J. (AP) New Jersey income taxpayers will have extra time to file their taxes.
Two of the systems are almost 60 years old - the oldest anywhere in the federal government, according to WaPo.
Earlier on Tuesday, a link to the IRS direct pay page was down, which could prevent individuals from paying their taxes before the deadline.