Questão jurídica principal
Where was the taxpayers' tax domicile for 2007?
Decisão extraída
Their center of interests had shifted to D. in 2007, but by 31 December 2007 both Berne and Valais had equal ties, creating an alternating domicile and requiring a split of taxing sovereignty.
Fundamentação extraída
The court weighed professional, family, social, and housing ties. The wife's part-time work in Berne was not decisive; social and family ties had moved to Valais, while the time spent and living conditions in both places were roughly equal.