If you paper file, it will take three to four weeks for the IRS to process the return and acknowledge your refund. If you e-file, you will get a notice of arrival within 24 hours and confirmation of refund within 72 hours.f you choose to have a paper check sent through the mail from the IRS, this option will add at least another two weeks to the process. 5. File on a Sunday or Monday. If you can control it, try to file on a Sunday or Monday to maximize the likelihood that you will receive your refund before the weekend.