Add Kleinunternehmerregelung (§19 UStG) support end-to-end

Checkout forces 0% VAT without de-grossing prices when the tenant is a
Kleinunternehmer (a business decision, not just an engineering default —
unlike the existing intra-community VAT exemption, which does de-gross).
Snapshotted onto the order at checkout time so a later toggle of the
company-settings checkbox never rewrites an already-issued invoice's tax
treatment — same reasoning as the existing vatExempt field.

Threaded through: checkout route, order creation/confirmation email,
on-demand invoice/Storno/Gutschrift downloads, the Bestellbestätigung
page, and the account order-detail page. The four storefront "inkl. X%
MwSt." price hints (shop grid, cart upsell, ToDo-Karten landing page,
homepage spotlight) drop that clause live when the setting is on. The
company-settings Live Preview reflects the checkbox in real time too.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

This commit is contained in:

Marco

2026-07-24 15:08:13 +00:00

parent 89dd11bf77

commit ba830947d2

23 changed files with 203 additions and 35 deletions

									
										app/lib/customerAuth.ts
									
		+1
		
												View File
												
				@@ -455,6 +455,7 @@ export type CustomerOrderDetail = CustomerOrder & {

				  companyName: string | null;

				  vatId: string | null;

				  vatExempt: boolean;

				  kleinunternehmer: boolean;

				  vatIdValidatedAt: string | null;

				  deliveryMethod: "address" | "packstation";

				  street: string | null;