Minnesota Bill HF1938 impact fix (PolicyEngine#4916)

* Minnesota Bill HF1938 impact fix
Fixes PolicyEngine#4915

* test

* name

changelog_entry.yaml

@@ -0,0 +1,4 @@
+- bump: patch
+  changes:
+    fixed:
+    - Minnesota Bill HF1938 impact fix.

policyengine_us/reforms/states/mn/walz/mn_walz_hf1938.py

@@ -139,7 +139,7 @@ def formula(tax_unit, period, parameters):
             agi = tax_unit("adjusted_gross_income", period)
             filing_status = tax_unit("filing_status", period)
             excess_agi = max_(
-                0, agi - p.reduction.income_threshold.low[filing_status]
+                0, agi - p.reduction.agi_threshold.low[filing_status]
             )
             excess_agi_offset = (
                 p.reduction.excess_agi_fraction.low * excess_agi

policyengine_us/tests/policy/contrib/states/mn/walz/mn_walz_hf1938.yaml

@@ -98,3 +98,14 @@
     mn_wfc: 2_206
     mn_child_and_working_families_credits: 3_850
     mn_refundable_credits: 5_770
+
+- name: Itemized deduction check for 2023 with reform
+  absolute_error_margin: 0.5
+  period: 2023
+  reforms: policyengine_us.reforms.states.mn.walz.mn_walz_hf1938.mn_walz_hf1938
+  input:
+    gov.contrib.states.mn.walz.hf1938.repeal: true
+    interest_deduction: 10_000
+    state_code: MN
+  output:
+    mn_itemized_deductions: 10_000

test.ipynb

@@ -56,7 +56,7 @@
     "from policyengine_us.data import CalibratedPUFExtendedCPS_2022\n",
     "\n",
     "CalibratedPUFExtendedCPS_2022().generate()\n",
-    "#Then rename calibrated_puf_extended_cps_2022.h5 to enhanced_cps_2022.h5 and upload"
+    "# Then rename calibrated_puf_extended_cps_2022.h5 to enhanced_cps_2022.h5 and upload"
    ]
   },
   {