diff --git a/taxcalc/validation/taxsim35/prepare_taxcalc_input.py b/taxcalc/validation/taxsim35/prepare_taxcalc_input.py
index eb4cee92f..2f781b564 100644
--- a/taxcalc/validation/taxsim35/prepare_taxcalc_input.py
+++ b/taxcalc/validation/taxsim35/prepare_taxcalc_input.py
@@ -109,6 +109,7 @@ def translate(ivar):
     assert np.all(np.logical_or(mars == 1, np.logical_or(mars == 2, mars == 4)))
     invar["MARS"] = mars
     num_eitc_qualified_kids = ivar["dep18"]
+    invar["f2441"] = invar["nu13"]
     invar["EIC"] = np.minimum(num_eitc_qualified_kids, 3)
     num_taxpayers = np.where(mars == 2, 2, 1)
     invar["XTOT"] = num_taxpayers + num_deps
diff --git a/taxcalc/validation/taxsim35/process_taxcalc_output.py b/taxcalc/validation/taxsim35/process_taxcalc_output.py
index 4ee820e6c..ccd494547 100644
--- a/taxcalc/validation/taxsim35/process_taxcalc_output.py
+++ b/taxcalc/validation/taxsim35/process_taxcalc_output.py
@@ -79,6 +79,7 @@ def write_taxsim_formatted_output(filename, tcvar):
     tcvar["non_refundable_child_odep_credit"] = (
         tcvar["c07220"] + tcvar["odc"] + tcvar["ctc_new"]
     )  # non-refundable child+odep credit
+    tcvar["refundable_CDCC"] = tcvar["CDCC_refund"] # refundable CDCC
     tcvar["amt_liability"] = tcvar["c09600"]  # federal AMT liability
     # var28 from TAXSIM-35 is federal income tax before credits; the Tax-Calculator
     # tcvar['c05800'] is this concept but includes AMT liability
@@ -111,6 +112,7 @@ def write_taxsim_formatted_output(filename, tcvar):
             "non_refundable_child_odep_credit",
             "c11070",
             "c07180",
+            "refundable_CDCC",
             "eitc",
             "c62100",
             "amt_liability",
@@ -118,7 +120,8 @@ def write_taxsim_formatted_output(filename, tcvar):
             "recovery_rebate_credit"
         ]
     ]
-    # better mapping of to how TAXSIM-35 handles refundalbe credits in 2021
+    # better mapping of to how TAXSIM-35 handles refundable credits in 2021
     tcvar.loc[tcvar["FLPDYR"] == 2021, "c11070"] = tcvar.loc[tcvar["FLPDYR"] == 2021, "non_refundable_child_odep_credit"]
+    tcvar.loc[tcvar["FLPDYR"] == 2021, "c07180"] = tcvar.loc[tcvar["FLPDYR"] == 2021, "refundable_CDCC"]
     tcvar.round(decimals=2)
     tcvar.to_csv(filename)