Key legal question
Whether the appeal could be treated as an appeal in public law matters and partly challenge the Vaud assessment
Extracted holding
The filing is treated as an appeal in public law matters; the Vaud assessment is deemed also challenged.
Extracted reasoning
The former state-law appeal no longer exists under the BGG; in intercantonal double-taxation cases a final assessment of another canton for the same period may be challenged together with the appealed judgment.