I'm trying to declare that I have other income coming in under the "my info" section but i cant find the state of Nevada under the options for the state selection.

That is only used to trigger the tax forms for state that have an income tax.

Since NV doesn't have an income tax, it's not there.

If you actually reside in some other state, All your income from NV will just be taxed by your state of residence.

The state of Nevada does not have a personal income tax so you will not be able to select Nevada.