Key legal question
Whether the refund claim for withholding tax was forfeited under Art. 23 VStG due to non-declaration.
Extracted holding
Yes. The deceased taxpayer did not properly disclose the taxable transaction and thereby forfeited the refund claim.
Extracted reasoning
The tax return and securities schedule did not sufficiently reveal the share sale, its price, or the taxable gain; the authorities could not infer the taxable income from the sparse bank entry.