I'm a resident alien under tax treaty, so I have both W2 (with an income in box 1) and 1042S (with another income). How can I state this and the tax treaty in my taxes?

I've stated the W2 income as turbotax requested. Then I've added the 1042-S income as other income, and the W2 income + 1042-S income with a negative sign (to take into account the tax treaty) as another income. However, turbotax is saying that my total income is $0. What number should I put as negative income to take into account the tax treaty? Where can I find it?