Simpson is currently in a Nevada prison doing time for robbery.
California claims Simpson owes them over $300k in taxes from the year 2000. Simpson also has a federal tax lien filed against him for the years 2007-2010, for just under $200k.
This comes just weeks after a Nevada judge agreed to grant Simpson a hearing in May to determine if the former football star, who in 2007 took sports memorabilia from a hotel room at gunpoint that he claims had been stolen from him, was so badly represented by his lawyers that he should be freed from prison and get another trial.
Simpson was also charged with the 1994 murder of his ex-wife Nicole Brown Simpson and her friend Ronald Goldman, but was acquitted of those murders. However, Simpson still owes the Goldman and Brown families millions from a wrongful death lawsuit he lost.
Read more at TMZ.