diff --git a/package-lock.json b/package-lock.json
index 8ff31b4..7659fdf 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2656,4 +2656,4 @@
       }
     }
   }
-}
+}
\ No newline at end of file
diff --git a/src/core/masks/brazilian-masks.ts b/src/core/masks/brazilian-masks.ts
new file mode 100644
index 0000000..0457b8a
--- /dev/null
+++ b/src/core/masks/brazilian-masks.ts
@@ -0,0 +1,25 @@
+export function numberMask(value: string): string {
+  return value.replace(/\D/g, "");
+}
+
+export function cpfTaxIdMask(value: string): string {
+  return value
+    .replace(/(\d{3})(\d)/, "$1.$2")
+    .replace(/(\d{3})(\d)/, "$1.$2")
+    .replace(/(\d{3})(\d{1,2})$/, "$1-$2");
+}
+
+export function cnpjTaxIdMask(value: string): string {
+  return value
+    .replace(/(\d{2})(\d)/, "$1.$2")
+    .replace(/(\d{3})(\d)/, "$1.$2")
+    .replace(/(\d{3})(\d)/, "$1/$2")
+    .replace(/(\d{4})(\d{1,2})$/, "$1-$2");
+}
+
+export function taxIdMask(value: string): string {
+  const valueWithoutSpecialCharacters = numberMask(value);
+  return valueWithoutSpecialCharacters.length > 11
+    ? cnpjTaxIdMask(valueWithoutSpecialCharacters)
+    : cpfTaxIdMask(valueWithoutSpecialCharacters);
+}