Lindsay Lohan -- I Screwed Up My Taxes ... 3 STRAIGHT YEARS!

If blowing off taxes was hockey ... Lindsay Lohan would've scored herself a hat trick ... 'cause the actress has just been hit with a tax bill for 2011 ... the 3rd straight year she stiffed the government.

This time, it's the State of California that's trying to collect ... claiming LiLo owes $56,717.90 for unpaid income tax for 2011.

In case you're keeping score ... the IRS was all over Lindsay's ass for unpaid federal taxes for 2009 ($93,701.57) and 2010 ($140,203.30).

Lohan was able to clear her 2009 debt thanks to a $100k check from her old pal Charlie Sheen ... but it seems like she's on her own for 2010 and 2011.

We reached out to Lohan's camp for comment -- so far, no word back.