Kernrechtsfrage
Whether the taxpayers could claim a CHF 800 deduction for expenses from self-employed side businesses.
Extrahierter Entscheid
No. The taxpayers failed to prove that deductible, unbooked expenses had actually been incurred.
Extrahierte Begründung
Self-employed persons may deduct business-related costs only if the expenses are directly connected to the activity and are substantiated. Here, the alleged side-business expenses were not shown to exist beyond the bookkeeping entries.