You do not get it all back. If you worked and earned income in AL you are subject to paying AL state income tax. But...you file a NON-resident state tax return for AL, and depending on how much was withheld, maybe you will get a refund of some of the state tax withheld. TX has no state income tax, so there is not a resident state for which AL will credit the AL tax.
https://ttlc.intuit.com/questions/2895920-why-would-i-have-to-file-a-nonresident-state-return
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