Nicholas Biase, a spokesman for the U.S. Attorney's Office for the Southern District of New York, tells TMZ ... the rapper pled not guilty to 14 counts of tax evasion. He needed 2 co-signers to pony up the bail. DMX has been slapped with travel restrictions that will require him to stay close to home ... in the NYC area. He'll also be under strict drug testing, and can't carry any firearms while on bail.

We're told the court will decide at a future hearing if X can leave the NYC area for work purposes. He has a show Saturday night in Brooklyn ... which he discussed outside court Friday. No refunds will be necessary.

TMZ broke the story ... DMX surrendered to the feds after prosecutors said he hid several years worth of income and now owes the IRS nearly $2 million.