diff --git a/README.md b/README.md
index acefa4c5..d86108b4 100644
--- a/README.md
+++ b/README.md
@@ -8,19 +8,13 @@ For Tax-Calculator results generated when using these TMD input files,
 see [this
 folder](https://github.com/PSLmodels/Tax-Calculator/tree/master/taxcalc/cli/input_data_tests).
 
-The **current TMD version is 2.1.3**, which was released on July 2,
-2026, and is the same as TMD version 2.1.2 except that at least Tax-Calculator
-version 6.7.1 (instead of 6.7.0) is required to generate the TMD files.
-This new Tax-Calculator version uses a more refined refundable
-credit claiming logic, which causes minor changes in the TMD input
-data files generated by this repo (even after some recalibration of
-the TMD data generation logic).  [Tax-Calculator pull request
-3087](https://github.com/PSLmodels/Tax-Calculator/pull/3087) shows the
-small differences in baseline policy results when using the new TMD
-2.1.3 input data files (instead of the old 2.1.2 input data files
-generated using Tax-Calculator version 6.7.0).
+The **current TMD version is 2.1.4**, which was released on July 13,
+2026, and is the same as TMD version 2.1.3 except that a new version
+of `scikit-learn` (1.9.0), which fixed a bug in its weighted imputation
+algorithm, is used (see #534 for details).  Tax-Calculator version 6.7.1
+or higher is required to generate the TMD files.
 
-When using version 2.1.3 to generate **sub-national weights**, there
+When using version 2.1.4 to generate **sub-national weights**, there
 will be (presumably small) differences from the sub-national weights
 generated using earlier versions; however, the sub-national weights
 fingerprints have not yet been updated.
diff --git a/setup.py b/setup.py
index 5986288e..0f659952 100644
--- a/setup.py
+++ b/setup.py
@@ -2,7 +2,7 @@
 
 setup(
     name="tmd",
-    version="2.1.3",
+    version="2.1.4",
     packages=find_packages(),
     python_requires=">=3.11,<3.14",
     install_requires=[
@@ -10,7 +10,7 @@
         "numpy",
         "pandas>=3.0.2",
         "clarabel",
-        "scikit-learn==1.8.0",
+        "scikit-learn>=1.9.0",
         "scipy",
         "xlrd",
         "openpyxl",
diff --git a/tests/expected_tax_exp_2022_data b/tests/expected_tax_exp_2022_data
index c21256f2..4c3999e6 100644
--- a/tests/expected_tax_exp_2022_data
+++ b/tests/expected_tax_exp_2022_data
@@ -1,4 +1,4 @@
-YR,KIND,EST= 2023 paytax 1428.8
+YR,KIND,EST= 2023 paytax 1431.0
 YR,KIND,EST= 2023 iitax 2332.1
 YR,KIND,EST= 2023 ctc 129.6
 YR,KIND,EST= 2023 eitc 66.9
diff --git a/tests/fingerprints/tmd_file_fingerprint.json b/tests/fingerprints/tmd_file_fingerprint.json
index 5be17097..c7172b38 100644
--- a/tests/fingerprints/tmd_file_fingerprint.json
+++ b/tests/fingerprints/tmd_file_fingerprint.json
@@ -12,9 +12,9 @@
       "count": 215406,
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@@ -22,7 +22,7 @@
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+      "weighted_sum": 382761531896.9072
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@@ -30,7 +30,7 @@
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@@ -54,7 +54,7 @@
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@@ -70,7 +70,7 @@
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@@ -78,7 +78,7 @@
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     "e27200": {
       "count": 215406,
@@ -574,7 +574,7 @@
       "min": -788181.0,
       "std": 10925.637488850629,
       "sum": 41631327.0,
-      "weighted_sum": 5697297470.00618
+      "weighted_sum": 5697435514.112961
     },
     "e32800": {
       "count": 215406,
@@ -582,7 +582,7 @@
       "min": 0.0,
       "std": 991.769628270785,
       "sum": 38622412.0,
-      "weighted_sum": 24873019035.53882
+      "weighted_sum": 24873076181.17432
     },
     "e58990": {
       "count": 215406,
@@ -590,7 +590,7 @@
       "min": 0.0,
       "std": 145993.7909284945,
       "sum": 906483448.0,
-      "weighted_sum": 5986550406.453
+      "weighted_sum": 5986561430.394481
     },
     "e62900": {
       "count": 215406,
@@ -598,7 +598,7 @@
       "min": 0.0,
       "std": 293731.1058035974,
       "sum": 3933115700.0,
-      "weighted_sum": 27963352411.37219
+      "weighted_sum": 27963365737.19936
     },
     "e87521": {
       "count": 215406,
@@ -606,7 +606,7 @@
       "min": 0.0,
       "std": 669.7531095966863,
       "sum": 26086045.0,
-      "weighted_sum": 30558969872.564133
+      "weighted_sum": 30559045903.31645
     },
     "e87530": {
       "count": 215406,
@@ -614,7 +614,7 @@
       "min": 0.0,
       "std": 307.1964479712465,
       "sum": 4572915.0,
-      "weighted_sum": 5548495926.49418
+      "weighted_sum": 5548534919.49897
     },
     "elderly_dependents": {
       "count": 215406,
@@ -622,15 +622,15 @@
       "min": 0.0,
       "std": 0.01445226558392807,
       "sum": 43.0,
-      "weighted_sum": 146907.10287
+      "weighted_sum": 146907.10285999998
     },
     "f2441": {
       "count": 215406,
       "max": 6.0,
       "min": 0.0,
-      "std": 0.8667430186714247,
-      "sum": 106299.0,
-      "weighted_sum": 59925111.659549996
+      "std": 0.8669170780166894,
+      "sum": 106378.0,
+      "weighted_sum": 59928158.53937
     },
     "f6251": {
       "count": 215406,
@@ -662,7 +662,7 @@
       "min": 0.0,
       "std": 6942.556869952304,
       "sum": 13962177.0,
-      "weighted_sum": 2535861912.84233
+      "weighted_sum": 2535883784.33591
     },
     "h_seq": {
       "count": 215406,
@@ -716,49 +716,49 @@
       "count": 215406,
       "max": 3.0,
       "min": 0.0,
-      "std": 0.20459343687731235,
-      "sum": 8750.0,
-      "weighted_sum": 5883444.77228
+      "std": 0.20312979636268422,
+      "sum": 8695.0,
+      "weighted_sum": 6021242.868690001
     },
     "n21": {
       "count": 215406,
       "max": 3.0,
       "min": 0.0,
-      "std": 0.2652609705230011,
-      "sum": 13309.0,
-      "weighted_sum": 11545723.151420001
+      "std": 0.26526939756265233,
+      "sum": 13285.0,
+      "weighted_sum": 11504743.507059999
     },
     "n24": {
       "count": 215406,
       "max": 7.0,
       "min": 0.0,
-      "std": 0.9595244713419911,
-      "sum": 129541.0,
-      "weighted_sum": 76558671.2613
+      "std": 0.9596792515312577,
+      "sum": 129610.0,
+      "weighted_sum": 76560318.57421
     },
     "nu06": {
       "count": 215406,
       "max": 4.0,
       "min": 0.0,
-      "std": 0.7411420060949722,
-      "sum": 69927.0,
-      "weighted_sum": 32700911.001209997
+      "std": 0.7405521836809181,
+      "sum": 69875.0,
+      "weighted_sum": 32773876.118869998
     },
     "nu13": {
       "count": 215406,
       "max": 6.0,
       "min": 0.0,
-      "std": 0.8875137813495467,
-      "sum": 107977.0,
-      "weighted_sum": 61258757.09811
+      "std": 0.8876909396838132,
+      "sum": 108064.0,
+      "weighted_sum": 61262522.06414
     },
     "nu18": {
       "count": 215406,
       "max": 7.0,
       "min": 0.0,
-      "std": 0.9789126567621053,
-      "sum": 135060.0,
-      "weighted_sum": 80049591.00795999
+      "std": 0.9789551114868931,
+      "sum": 135139.0,
+      "weighted_sum": 79952756.98947
     },
     "other_ben": {
       "count": 215406,
@@ -770,11 +770,11 @@
     },
     "overtime_income": {
       "count": 215406,
-      "max": 35825020.0,
+      "max": 41543982.0,
       "min": 0.0,
-      "std": 200449.36764264424,
-      "sum": 2201369091.0,
-      "weighted_sum": 255224518789.46472
+      "std": 242677.7426078435,
+      "sum": 2422966216.0,
+      "weighted_sum": 258136099437.569
     },
     "p08000": {
       "count": 215406,
@@ -782,7 +782,7 @@
       "min": 0.0,
       "std": 622.2480506114819,
       "sum": 7084352.0,
-      "weighted_sum": 1032781389.61988
+      "weighted_sum": 1032791658.2455299
     },
     "p22250": {
       "count": 215406,
@@ -790,7 +790,7 @@
       "min": -127307103.0,
       "std": 1321365.3334108167,
       "sum": -1646865403.0,
-      "weighted_sum": -106922752645.619
+      "weighted_sum": -106922880205.01129
     },
     "p23250": {
       "count": 215406,
@@ -798,31 +798,31 @@
       "min": -42756430.0,
       "std": 7031402.352506946,
       "sum": 230507622544.0,
-      "weighted_sum": 1126451742651.1536
+      "weighted_sum": 1126452403463.1355
     },
     "pencon_p": {
       "count": 215406,
       "max": 27000.0,
       "min": 0.0,
-      "std": 6386.922516752437,
-      "sum": 690867044.0,
-      "weighted_sum": 263780602131.5962
+      "std": 5492.544533068963,
+      "sum": 599531446.0,
+      "weighted_sum": 273883554982.32843
     },
     "pencon_s": {
       "count": 215406,
       "max": 27000.0,
       "min": 0.0,
-      "std": 4875.493021873777,
-      "sum": 376013951.0,
-      "weighted_sum": 76618038197.77611
+      "std": 4375.300030445908,
+      "sum": 345125117.0,
+      "weighted_sum": 79642890563.57019
     },
     "s006": {
       "count": 215406,
       "max": 16580.29985,
       "min": 0.10804,
-      "std": 1088.9497886029867,
-      "sum": 189298329.80652,
-      "weighted_sum": 421785907934.16187
+      "std": 1088.9490606747684,
+      "sum": 189298482.63942,
+      "weighted_sum": 421785835057.9484
     },
     "snap_ben": {
       "count": 215406,
@@ -850,11 +850,11 @@
     },
     "tip_income": {
       "count": 215406,
-      "max": 9702508.0,
+      "max": 37670271.0,
       "min": 0.0,
-      "std": 60700.635785336664,
-      "sum": 384497356.0,
-      "weighted_sum": 64418247757.171974
+      "std": 134938.31073606285,
+      "sum": 532488136.0,
+      "weighted_sum": 64827455990.87724
     },
     "vet_ben": {
       "count": 215406,
@@ -874,11 +874,11 @@
     }
   },
   "metadata": {
-    "generated": "2026-06-30",
+    "generated": "2026-07-13",
     "n_columns": 109,
     "n_records": 215406,
     "scope": "tmd_file",
-    "taxcalc_version": "6.7.0a",
+    "taxcalc_version": "6.7.2",
     "taxyear": 2022
   }
 }
\ No newline at end of file
diff --git a/tests/test_imputed_variables.py b/tests/test_imputed_variables.py
index f8bf5241..45ac83ad 100644
--- a/tests/test_imputed_variables.py
+++ b/tests/test_imputed_variables.py
@@ -55,9 +55,9 @@ def actual_results(rdf, bdf):
             # https://taxpolicycenter.org/taxvox/
             #         budget-laws-tax-cuts-overtime-and-
             #         tips-are-popular-few-will-benefit
-            "exp_totben_2022": 24.21,
-            "exp_affpct_2022": 8.91,
-            "exp_affben_2022": 1391,
+            "exp_totben_2022": 24.39,
+            "exp_affpct_2022": 8.78,
+            "exp_affben_2022": 1421,
         },
         "TIP": {  # new OBBBA tip income deduction
             "reform_dict": {"TipIncomeDed_c": {simyear: 0}},
@@ -72,9 +72,9 @@ def actual_results(rdf, bdf):
             # https://taxpolicycenter.org/taxvox/
             #         budget-laws-tax-cuts-overtime-and-
             #         tips-are-popular-few-will-benefit
-            "exp_totben_2022": 7.00,
+            "exp_totben_2022": 7.16,
             "exp_affpct_2022": 2.64,
-            "exp_affben_2022": 1359,
+            "exp_affben_2022": 1391,
         },
         "ALI": {  # new OBBBA auto loan interest deduction
             "reform_dict": {"AutoLoanInterestDed_c": {simyear: 0}},
@@ -87,9 +87,9 @@ def actual_results(rdf, bdf):
             # because the Tax Policy Center did not provide any
             # statistics for this new deduction.  However, see the
             # following reform analysis for FOUR reforms.
-            "exp_totben_2022": 8.01,
-            "exp_affpct_2022": 12.81,
-            "exp_affben_2022": 319,
+            "exp_totben_2022": 8.14,
+            "exp_affpct_2022": 12.84,
+            "exp_affben_2022": 324,
         },
         "ALL": {  # above three deductions plus new OBBBA senior deduction
             "reform_dict": {
@@ -107,9 +107,9 @@ def actual_results(rdf, bdf):
             # https://taxpolicycenter.org/model-estimates/T25-0257
             # Note that the $1081 TPC estimate is derived by dividing
             # the all-unit average of $320 by the 0.296 affpct.
-            "exp_totben_2022": 59.56,
-            "exp_affpct_2022": 29.14,
-            "exp_affben_2022": 1046,
+            "exp_totben_2022": 60.03,
+            "exp_affpct_2022": 28.97,
+            "exp_affben_2022": 1061,
         },
     }
     output_variables = [
diff --git a/tests/test_weights.py b/tests/test_weights.py
index a5090498..014080e7 100644
--- a/tests/test_weights.py
+++ b/tests/test_weights.py
@@ -50,7 +50,7 @@ def test_weights(tmd_variables):
             "sdev": 1088.949,
             "min": 0.10804,
             "p25": 21.7881,
-            "p50": 396.825,
+            "p50": 396.865,
             "p75": 1437.48,
             "max": 16580.30,
             "sum_sq": 421785907934.2,