Looking for 1099 NEC Instructions? Information about Form 1099NEC, Nonemployee Compensation, including recent updates, related forms, and instructions on how to file.Learn about 1099-NEC, which working arrangements will prompt you to submit it, the information you need to collect, and the deadlines. Commanding Officers (CO) of IUSS commands can request NEC assignment based on OJT if mandatory course has not been completed. The provisions of Section l.A.2. Individuals must report these amounts as explained in these box 1 instructions.