<<So am I correct in taking this to mean that since I am the one performing the services for business (in this case photography) my income falls under MSRRA and I should claim it in WI?>>
The VBTA law of 2018 gives military spouses the choice of filing taxes either in their own domiciliary state, or in the domiciliary state (SLR) of their active duty servicemember spouse.
Since you and your spouse are both domiciliary residents of WI, you must report your income to WI.
See Question 9 of this reference:
https://www.revenue.wi.gov/Pages/FAQS/pcs-military.aspx#:~:text=Note%3A%20If%20your%20spouse%20is,is...
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
