@kelic3 Yours is more complicated but the answer is still pretty simple. You are only a resident of one state. All of your Texas sourced income is earned as a resident of Colorado. You travel a lot for work but all of that travel is seen as traveling away from your residence so Colorado still gets dibs on everything that you earn, even though it is from a Texas source. If Texas taxed the income too then you would get a deduction for the taxes paid in Texas but since they do not Colorado steps in.
As far as filing in all of the states that you worked in the answer is - it depends. Each of those states has different rules about how long you have to be working in their state in order to have to file a return. But since the income is all being taxed by Colorado and none of it was earned from sources within those many states you can make choices about filing there. If you do choose to file a New York return, for instance, then any taxes that you paid to New York would be deductible on your Colorado return.
Here is a list for the filing requirements in every state.
In future, if you do not maintain a permanent residence anywhere and you do not stay in any one location long enough to require you to file a return in that location, then you can change your state of residence to one without any state tax filing obligations.
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