diff --git a/frontend/src/lib/components/dashboard/invoices/edit/invoice-top-fields.svelte b/frontend/src/lib/components/dashboard/invoices/edit/invoice-top-fields.svelte
index 4b82e31d..99e49e88 100644
--- a/frontend/src/lib/components/dashboard/invoices/edit/invoice-top-fields.svelte
+++ b/frontend/src/lib/components/dashboard/invoices/edit/invoice-top-fields.svelte
@@ -150,6 +150,8 @@
 			fecha_pedimento_al: '',
 			clave_pedimento: '',
 			regimen_pedimento: '',
+			invoice_prefix: '',
+			invoice_initial_number: '',
 			iva_factor: invoice?.financials?.iva_factor || '',
 			alternate_invoice: invoice?.alternate_invoice || ''
 		};
@@ -327,6 +329,56 @@
 		</div>
 	{/if}
 
+	<!-- Parámetros legados: NÚMERO FACTURA (prefijo + consecutivo) y datos derivados del pedimento.
+	     Solo visibles en el formulario de parámetros/configuración. -->
+	{#if isSettings}
+		<div class="min-w-[100px] flex-1 space-y-1">
+			<Label for="invoice_prefix" class="text-xs">Prefijo</Label>
+			<Input id="invoice_prefix" bind:value={formData.invoice_prefix} class="h-8 text-sm" />
+		</div>
+
+		<div class="min-w-[100px] flex-1 space-y-1">
+			<Label for="invoice_initial_number" class="text-xs">Número Inicial</Label>
+			<Input
+				id="invoice_initial_number"
+				bind:value={formData.invoice_initial_number}
+				class="h-8 text-sm"
+			/>
+		</div>
+
+		{#if invoiceType !== 'MEX'}
+			<div class="min-w-[90px] flex-1 space-y-1">
+				<Label for="clave_pedimento" class="text-xs">Clave</Label>
+				<Input id="clave_pedimento" bind:value={formData.clave_pedimento} class="h-8 text-sm" />
+			</div>
+
+			<div class="min-w-[90px] flex-1 space-y-1">
+				<Label for="regimen_pedimento" class="text-xs">Régimen</Label>
+				<Input id="regimen_pedimento" bind:value={formData.regimen_pedimento} class="h-8 text-sm" />
+			</div>
+
+			<div class="min-w-[140px] flex-[1.5] space-y-1">
+				<Label for="fecha_pedimento_del" class="text-xs">Rango de Fechas (Del)</Label>
+				<Input
+					id="fecha_pedimento_del"
+					type="date"
+					bind:value={formData.fecha_pedimento_del}
+					class="h-8 text-sm"
+				/>
+			</div>
+
+			<div class="min-w-[140px] flex-[1.5] space-y-1">
+				<Label for="fecha_pedimento_al" class="text-xs">Rango de Fechas (al)</Label>
+				<Input
+					id="fecha_pedimento_al"
+					type="date"
+					bind:value={formData.fecha_pedimento_al}
+					class="h-8 text-sm"
+				/>
+			</div>
+		{/if}
+	{/if}
+
 	{#if !isSettings}
 		<div class="min-w-[140px] flex-[2] space-y-1">
 			<Label for="invoice_number" class="text-xs"
diff --git a/frontend/src/routes/dashboard/invoices/settings/+page.svelte b/frontend/src/routes/dashboard/invoices/settings/+page.svelte
index 01a5da3a..7b77885c 100644
--- a/frontend/src/routes/dashboard/invoices/settings/+page.svelte
+++ b/frontend/src/routes/dashboard/invoices/settings/+page.svelte
@@ -181,6 +181,8 @@
 			fecha_pedimento_al: '',
 			clave_pedimento: '',
 			regimen_pedimento: '',
+			invoice_prefix: '',
+			invoice_initial_number: '',
 			...(systemData.InvoiceTopFieldsFormData || {})
 		};
 		generalFormData = {
@@ -307,7 +309,9 @@
 			fecha_pedimento_del: '',
 			fecha_pedimento_al: '',
 			clave_pedimento: '',
-			regimen_pedimento: ''
+			regimen_pedimento: '',
+			invoice_prefix: '',
+			invoice_initial_number: ''
 		};
 		generalFormData = {
 			provider_header: 'proveedor',