Tax evasion is a FELONY and a very serious crime. A conviction for tax evasion can carry with it up to a five-year prison sentence and/or fines up to $100,000. . Filing a false return: Prosecution for this crime is appropriate when a taxpayer has provided the government with false or misleading information on the taxpayer’s tax return. In such cases, the government does not have to prove the taxpayer intended to evade tax laws. Rather, it merely must prove that the taxpayer filed a false return. Filing a false return is a felony. Punishment for this crime can consist of up to three years in prison and/or up to $100,000 in fines. . Not filing a tax return at all: Failing to file a tax return is the least serious of the three tax crimes. It is a MISDEMEANOR. The consequences for being found guilty is a maximum of 1 year in prison and/or fines totaling up to $25,000 for each year a taxpayer failed to file.