The general rule is: your report all your income on your home state return, even the income earned out of state. You file a non-resident state return for the state you worked in and pay tax to that state. Your home state will give you a credit, or partial credit, for what you paid the non-resident state.
Since NV does not have an income tax, you do not have a non-resident return to file. But you still have to pay tax on that income to your home state (WI).
When you worked in a state without an income tax (e.g. Nevada, Texas or Florida), there will be no credit, since there was no NV tax. In other words, having worked in a state without an income tax does not get you out of paying state tax on that income, to your home state.
A separate issue is does working remotely, in your home state, for a job based in another state, count as working in the other state. It's not relevant in your case. But, for others reading this, the general answer is no but there are exceptions.
New York, Pennsylvania, Nebraska, Delaware and New Jersey have the aggressive telecommuting rules. If you work outside one of those states as a job requirement, you are only subject to that state's income tax on the days you work there. But if you work outside the state for your own convenience, you are subject to that state's income tax on all your income. For guidance see: http://www.journalofaccountancy.com/issues/2009/jun/20091371.html
