I'm in the military with Texas state residency. My wife changed from DC to CA residency in Oct. She made ~1300 before expenses in a home business.Does she need to file?

[soar1]

It depends on whether this was her total income for the year.  The IRS website says that you must file if your Adjusted Gross Income is >$5 for 2018 (https://www.irs.gov/help/ita/do-i-need-to-file-a-tax-return).  If she is showing a net loss, if this was her only income source, and if she is married filing separately, and if she provided at least 50% of her own support, then she would not have to file.