We observe a specific type of tax evasion among business owners in Swedish administrative panel data, after the tax authority has approved all tax returns. For the period 2006-2009, approximately 5% of tax returns overstate a claimed dividend allowance. Tax awareness decreases and complexity increases the likelihood of misreporting. Some observed misreporting could be accidental, while some misreporting is deliberate tax evasion. We identify a positive and significant effect of tax rates on tax evasion, by exploiting a large kink in the tax schedule. The majority of misreporting cases remains undetected. Self-correction is the dominant type of detection.