USt-DFV (with -SVZ)
Permanent extension of the deadline for VAT returns with special advance payment (German: Umsatzsteuer-Dauerfristverlängerung mit Sondervorauszahlung)
Endpoints
Documented in Postman.
SVZ
/v1/ustsvz
DFV
/v1/ustdfv
Official forms
Form for tax year 2026 has not been published yet officially. The following is a draft dated October 2025.
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