“A number” of systems used by the Internal Revenue Service that allow taxpayers to file required forms and payments crashed – on the day that those documents were due.

A Fox affiliate in Denver, KDVR, reported the IRS said in a statement, “Currently, certain IRS systems are experiencing technical difficulties. Taxpayers should continue filing their tax returns as they normally would.”

The Washington Post quoted IRS Acting Commissioner David Kautter, who was talking with lawmakers at an IRS oversight hearing Tuesday, “On my way over here this morning, I was told a number of systems are down at the moment. We are working to resolve the issue…”

CNBC reported that one of the operations that was out of order was the “Direct Pay” process, which lets Americans pay their taxes with funds in a checking or savings account.

The deadline for filing – and paying – taxes is midnight.