The IRS might just have some money for you!

The Internal Revenue Service has about $266 million sitting around, waiting to be retrieved by you. The agency says that 279,000 economic stimulus checks never got to taxpayers ($163 million) and 104,000 tax refunds never made it there either ($103 million). The most common reason taxpayers don't get receive their checks? Address typos or taxpayers who moved without forwarding their mail.

The average stimulus check sitting around waiting to be claimed is $583. That money might come in handy, especially with the current economic turmoil. If you think you might be entitled to a check, you can use this tool on the IRS website to check your stimulus check status and update your address. There's a similar tool for those missing tax refunds.

Remember that when it comes to the IRS, the taxpayer generally bears the full burden of making sure records are accurate. That means if you move, it's your responsibility to notify the IRS. Having the the correct address on file with the agency ensures that you'll get any notices or money in a timely fashion. If you need to update your address with the IRS, you can follow the instructions on this page.

Tracy L. Coenen, CPA, MBA, CFE performs fraud examinations and financial investigations for her company Sequence Inc. Forensic Accounting, and is the author of Essentials of Corporate Fraud.