Board Thread:Lore Discussion/@comment-1600847-20160719191042/@comment-1600847-20160719200248

It could be it's independent, but without confirmation I'll assume its still a part of the Empire.

What you showed would suggest that Solstheim is indepenent, but given the Solstheim independence Treaty line of "exempt from taxes, except for what was writ the Armistice of Old" would imply that, at the very least, Solstheim still pays taxes to the Empire.