diff --git a/openapi.yaml b/openapi.yaml
index af7942b25..b51928614 100644
--- a/openapi.yaml
+++ b/openapi.yaml
@@ -19026,8 +19026,8 @@ components:
           description: >
             The tax identification number associated with this Account,
             for tax calculations in some countries.
-            If you do not live in a country that collects tax, this should be `null`.
-          maxLength: 100
+            If you do not live in a country that collects tax, this should be an empty string (`""`).
+          maxLength: 25
           example: ATU99999999
         euuid:
           type: string