Question juridique clé
Whether the 2014 contribution base had to follow the Basel-Landschaft tax notification or the rectified Solothurn tax assessment.
Solution extraite
The matter could not be finally decided on the existing record; the appealed contribution assessments and the objection decision had to be set aside and the case remanded for further clarification and a new decision.
Motifs extraits
The court found that the later rectified Solothurn assessment and the circumstances surrounding the inconsistent tax determinations prevented continued reliance on the Basel-Landschaft notice without further inquiries. The record was insufficient to determine the correct contributory self-employment income.