One of the biggest questions I’ve been seeing this year are what the various reference codes mean on the IRS Refund Status Tool (previously known as “Where’s My Refund”) – or on the IRS2Go app. A lot of tax filers are getting IRS Reference Codes back, but don’t know what they mean and don’t know if they are in trouble.For more information on WMR, check out When To Expect My Tax Refund Tax Calendar.However, finding the IRS reference codes has also been one of the hardest things to track down this year, especially with all the changes to the way the IRS is processing refunds.Anyway, here are the IRS Where’s My Refund Tool Reference codes. You read this chart by first looking for your code, then seeing what the error is. Each error has a specific set of steps that the IRS will follow, called Inquiry Response Procedure. Here is the list of what the IRM Codes mean.Also, if you’re concerned about a generic message that says “Refer to Tax Topic 152”, all that means is check out these tips about getting your refund. Here is a link to Tax Topic 152.We put together a list of common errors and issues, you can check it out here: IRS Where’s My Refund Common Questions.