diff --git a/app/routes/ventas.py b/app/routes/ventas.py
index 361c244..2252da3 100644
--- a/app/routes/ventas.py
+++ b/app/routes/ventas.py
@@ -236,7 +236,8 @@ async def send_one(
         return JSONResponse({"success": False, "message": f"Error login TNS: {token_err}"})
 
     headers = {"Content-Type": "application/json", "Authorization": f"Bearer {token}"}
-    endpoint = f"{TNS_BASE}/v2/facturacion/Ventas/Crear"
+    api_sucursal = cfg.get("api_sucursal", "") or "00"
+    endpoint = f"{TNS_BASE}/v2/facturacion/Ventas/Crear?codigosucursal={api_sucursal}"
     venta_json = _build_venta(grupo_rows, cfg)
     contrato = str(grupo_rows[0].get("CODCONTRATO") or "").strip()
 
@@ -287,7 +288,8 @@ async def send_ventas(
         return JSONResponse({"success": False, "message": f"Error login TNS: {token_err}"})
 
     headers = {"Content-Type": "application/json", "Authorization": f"Bearer {token}"}
-    endpoint = f"{TNS_BASE}/v2/facturacion/Ventas/Crear"
+    api_sucursal = cfg.get("api_sucursal", "") or "00"
+    endpoint = f"{TNS_BASE}/v2/facturacion/Ventas/Crear?codigosucursal={api_sucursal}"
 
     resultados = []
     async with httpx.AsyncClient(timeout=int(cfg.get("api_timeout", 30))) as client: