Non Profit Tax ID Number.

Hello. A few years ago I was starting a non-profit and received a Tax ID number. Other things came up in my life and I never really got the non profit up and going. I am hoping to do that in 2020. However, I noticed that my TaxID number is suspended because the taxes weren't filed by November 15th deadline. I didn't know that I needed to file when I hadn't used the number yet. I am having a hard time figuring out which short form the IRS needs me to fill out to reinstate my Tax ID number. I am looking to find someone who can do this for me and how much it will cost.