WTF! METHOD MAN OWES UNCLE SAM! HE HASN'T PAID TAXES FOR 4 YEARS! THE IRS CAME & GOT HIM TODAY!

Method Man ... meet police man.
The Wu Tang rapper reportedly surrendered to cops on Staten Island this morning on charges of failing to pay four years worth of income taxes.

According to WABC in New York, Meth owes $32,799 to Uncle Sam -- not including fees and penalties.

Meth -- real name Clifford Smith -- will be arraigned at Staten Island criminal court later today. If convicted, he could face four years behind bars.