You will prepare a federal return, using the most current address for yourself so that the IRS will know where to mail you a letter or a check. You do not have a state income tax in Texas, so nothing to file for TX. If you live and work in Maine for part of the year in 2024, you will need to file a part-year resident state return in Maine and allocate the amount of income received while living/working in Maine.
https://ttlc.intuit.com/questions/1901227-how-do-i-file-a-part-year-state-return
https://ttlc.intuit.com/questions/1901560-how-do-i-file-if-i-moved-to-a-different-state-last-year
https://ttlc.intuit.com/questions/2895983-how-do-i-allocate-split-income-for-a-part-year-state-retur...
https://ttlc.intuit.com/questions/1901267-which-states-don-t-have-income-tax
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