"The IRS alerted taxpayers and the tax community it is experiencing high traffic on 'Where's My Refund?' as more tax returns come in," the agency said in a prepared statement. "The heavy volume of refund inquiries means that the IRS anticipates both 'Where's My Refund?' on IRS.gov and the refund feature on the IRS2go phone app will have limited availability during busier periods."
The IRS asked taxpayers and tax preparers not to use the service more than once per day.
"To avoid system delays, the best time to check on refunds is evening and weekends," the IRS added.
The agency asked people using the system to have correct tax information ready before using it. Needed information includes your Social Security number, filing status and refund amount.
"There is no need to call the IRS about your refund," the IRS said. "The telephone service has the same information that is available on 'Where’s My Refund?'."