Where's My Refund? The Internal Revenue Service’s ‘Where’s My Refund’ tool offers the most up-to-date information regarding the processing status of your tax refund. The tool is available 24/7 using the IRS2Go phone app or the IRS website. You can begin checking the status of your return 24 hours after your e-filed return has been submitted to the IRS or four weeks after mailing your paper return. The tool is updated every 24 hours so you only need to check it once a day.