diff --git a/taxcalc/policy.py b/taxcalc/policy.py
index 170600a9a..c0aefa806 100644
--- a/taxcalc/policy.py
+++ b/taxcalc/policy.py
@@ -37,7 +37,7 @@ class instance: Policy
     DEFAULTS_FILE_NAME = 'policy_current_law.json'
     DEFAULTS_FILE_PATH = os.path.abspath(os.path.dirname(__file__))
     JSON_START_YEAR = 2013  # remains the same unless earlier data added
-    LAST_KNOWN_YEAR = 2020  # last year for which indexed param vals are known
+    LAST_KNOWN_YEAR = 2022  # last year for which indexed param vals are known
     # should increase LAST_KNOWN_YEAR by one every calendar year
     LAST_BUDGET_YEAR = 2034  # last extrapolation year
     # should increase LAST_BUDGET_YEAR by one every calendar year