Use the domiciliary address in the filing of tax returns and file the returns in the place of domicile whenever possible. If I am not a resident of Alabama, but earned income from Alabama sources, am I required to file an Alabama tax return?Yes. According to Reg. 810-3-15-. Online: Go to Homestead Tax Credit Eligibility Application page, and complete the online form. Filing an online application will be faster than mailing one in. Answer: A Maryland resident who takes up temporary residence in another state does not lose their Maryland domicile for purposes of the. Maryland income tax. File your federal income tax return with the appropriate IRS regional service center and show your state of desired domicile as your residence address. Determining residency for state tax purposes can get complicated. We offer guidelines for determining domiciles and residency.