Pretty much everyone uses this mentality with some law.
Ever go 46 MPH in a 45 MPH zone?
Tax evasion and speeding are not in the same category of crime, not even close. One is generally an infraction (not even a misdemeanor) and the other is a felony.
fr speeding can cause injury to others especially when done more than a bit, unless you're a highly trained driver or smth. tax evasion causes no physical harm to anyone.
Evading a few bucks from running numbers on your graphics card is not laundering money to fund trafficking or depriving schools of books.
If it's a rounding error, then they're both negligible crimes.