Ozzy and Sharon Osbourne owe more than $1.7 million to the IRS in back taxes ... this according to documents obtained by TMZ.
The IRS filed a document last Monday with the L.A. County Recorder's Office, claiming Ozzy and Sharon owe $718,948.25 for the 2008 tax year, and $1,024,175.03 for 2009.
Sharon had a tax lien issue in 2009, when she owed $23,000 to the State of California for the 2007 tax year.
And Kelly also has tax issues ... last month the State of California filed a lien against her for $34,000.
No comment so far from the Osbourne's rep.