Suge Knight's still got money in the bank and it looks like he's using some of it to pay off his $30k tax bill from the State of California.

Suge was hit with 2 tax liens -- one for $18,340.37 from 2011, and another for $11,764.92 from 2012. The Death Row honcho's still behind bars, facing a murder charge in a fatal hit-and-run back in January 2015, but according to docs he made things right with the taxman in August.

He's still a far ways off from a clean slate, but taking care of tax bills ... it's a start.