How do I file State Taxes. I live in MS and My husband in TX

Accoding to the FAQ on the MS web site: Individual Income FAQs

How do we file a tax return when one spouse is a resident of Mississippi and the other is not?
You must file a Mississippi Non-Resident / Part-Year Return Form 80-205. The resident spouse will report to Mississippi income earned from all sources for the entire year. The spouse that is not a resident will report to Mississippi income earned in Mississippi, but will declare his or her total income for purposes of prorating income and deductions.