O.J. Simpson -- The Tax Liens Just Keeeeeep On Coming

If O.J. Simpson's new goal in life is to be on the IRS' s**t list forever ... he's doing a great job ... because the agency just filed ANOTHER tax lien against him to the tune of $63,413.79.

Uncle Sam filed the lien in Florida earlier this month, claiming Simpson still needs to cough up income taxes from the year 2006.

TMZ broke the story (ies) ... Simpson's knee-deep in tax debt already. He has federal liens against him totaling over $190,000 for the years 2007-2011, and the State of CA issued a tax lien against him for $318,566.04 for the year 2000.

All totaled ... it's about $580,000 of debt.