# What is the Lewis structure for No_3^+?

I assume you mean nitrate ion, $N {O}_{3}^{-}$.
Nitrate ion has $5 + 3 \times 6 + 1 = 24 \cdot \text{electrons}$ to distribute over 4 centres. Three of the atoms have formal net charges, 2 negative, and a positive, quaternized nitrogen. The formal charge of the ion is $- 1$.
""^+N(=O)(-O)_2^(-)