Generally speaking, iif you were deported for simply being an overstay then the period of inadmissibility associated with the deportation is 10 years. If you are applying for admission to the U.S. more than 10 years after you physically departed the U.S. then you should no require a waiver for your prior deportation since the period of inadmissibility would have elapsed.
Keep in mind, however, that you still need to qualify for an appropriate visa to enter the U.S. The fact that you have a prior deportation on your record will complicate the process notwithstanding the fact that the 10 year period may have run.
Consult with an experienced immigration attorney who can review the facts of your case, advise you of the options available, and recommend an appropriate course of action. Many attorneys, including myself, will conduct consultations for clients our of their local area by telephone or Skype.