Kernrechtsfrage
Whether VAT paid without reservation under a then-valid administrative practice must be refunded after the practice was later found incorrect.
Extrahierter Entscheid
No refund is owed where the taxpayer declared and paid the tax without reservation under the applicable practice; later practice changes do not retroactively undo that self-assessment.
Extrahierte Begründung
For self-assessment taxes, the taxpayer is bound by an unreserved declaration and payment. The VAT system leaves the taxpayer responsible for classification and declaration, while the tax administration only collects and controls. A later judicial correction of the administration's practice does not create a reimbursement claim for already unreservedly paid taxes.