See the [recent work of Spiritus, Lehmann, Renes, and Zoutman](https://www.dropbox.com/s/w9vpqczjuf554d8/SpiritusLehmannRenesZoutman2022.pdf?dl=0) on optimal taxation with multiple income sources. In principle, one can use this optimal tax theory with the inverse optimal tax method.
See the recent work of Spiritus, Lehmann, Renes, and Zoutman on optimal taxation with multiple income sources. In principle, one can use this optimal tax theory with the inverse optimal tax method.