You are a Colorado resident and a Texas nonresident. You never left Colorado. It continued to be your tax home. Therefore, you cannot claim that you were a part-year Texas resident and exempt that income from your Colorado return. However, since your Texas job was a temporary assignment, you may be entitled to significant other deductions. Please click this link for a description: Temporary Assignment or Job. If this fits your situation, here's another link describing the types of deductions on your Federal Return (and Colorado, if Colorado accepts itemized deductions): What Travel Expenses Are Deductible? (please note there is a link to Table 1-1 which provides a list of the expenses).
If you qualify to deduct these expenses, you will do so using Form 2106. Here's how you will access that form, according to this FAQ: https://ttlc.intuit.com/replies/4800418
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