If you have filed your tax return and you wish to track your refund the IRS offers an online tool to track this. According to IRS.gov they have been reporting a high number of online requests on this tool. So much so that they are advising everyone that the information about refund status is only updated once daily. If you have already checked for the day then there is no need to check again. Maybe the IRS is worried about too many people checking at the same time and then that bringing down their website with so much traffic.