Per Missouri, "You do not have to file a Missouri return if you are not required to file a federal return. If you are required to file a federal return, you may not have to file a Missouri return if:
- you are a resident and have less than $1,200 of Missouri adjusted gross income;
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you are a nonresident with less than $600 of Missouri income; or
- your Missouri adjusted gross income is less than the amount of your standard deduction plus your personal exemption."
For more information, please click this Missouri Dept. of Revenue: http://dor.mo.gov/personal/nonresident/#filing