diff --git a/l10n_us_hr_payroll/data/state/in_indiana.xml b/l10n_us_hr_payroll/data/state/in_indiana.xml
index 9bda9b1e..56b7a979 100644
--- a/l10n_us_hr_payroll/data/state/in_indiana.xml
+++ b/l10n_us_hr_payroll/data/state/in_indiana.xml
@@ -7,6 +7,7 @@
         <field name="country_id" ref="base.us"/>
     </record>
     <data noupdate="1">
+        <!-- unchanged in 2021 - page 64 - https://www.in.gov/dwd/files/Employer_Handbook.pdf -->
         <record id="rule_parameter_us_in_suta_wage_base_2020" model="hr.rule.parameter.value">
             <field name="parameter_value">9500.00</field>
             <field name="rule_parameter_id" ref="rule_parameter_us_in_suta_wage_base"/>
@@ -14,19 +15,21 @@
         </record>
     </data>
 
-    <!-- Rate -->
+    <!-- SUTA Rate -->
     <record id="rule_parameter_us_in_suta_rate" model="hr.rule.parameter">
         <field name="name">US IN Indiana SUTA Rate</field>
         <field name="code">us_in_suta_rate</field>
         <field name="country_id" ref="base.us"/>
     </record>
     <data noupdate="1">
+        <!-- unchanged in 2021 - page 63 - https://www.in.gov/dwd/files/Employer_Handbook.pdf -->
         <record id="rule_parameter_us_in_suta_rate_2020" model="hr.rule.parameter.value">
             <field name="parameter_value">2.5</field>
             <field name="rule_parameter_id" ref="rule_parameter_us_in_suta_rate"/>
             <field name="date_from" eval="datetime(2020, 1, 1).date()"/>
         </record>
     </data>
+
     <!-- state income rate -->
     <record id="rule_parameter_us_in_suta_income_rate" model="hr.rule.parameter">
         <field name="name">US IN Indiana SUTA Income Rate</field>
@@ -34,6 +37,7 @@
         <field name="country_id" ref="base.us"/>
     </record>
     <data noupdate="1">
+        <!-- unchanged in 2021 - page 2 - https://www.in.gov/dor/files/dn01.pdf -->
         <record id="rule_parameter_us_in_suta_income_rate_2020" model="hr.rule.parameter.value">
             <field name="parameter_value">3.23</field>
             <field name="rule_parameter_id" ref="rule_parameter_us_in_suta_income_rate"/>
@@ -47,6 +51,7 @@
         <field name="country_id" ref="base.us"/>
     </record>
     <data noupdate="1">
+        <!-- unchanged in 2021 - page 2 Table A - https://www.in.gov/dor/files/dn01.pdf -->
         <record id="rule_parameter_us_in_sit_personal_exemption_rate_2020" model="hr.rule.parameter.value">
             <field name="parameter_value">{
                 'daily':          (  2.74,   5.48,   8.22,  10.96,  13.70,  16.44),
@@ -66,6 +71,7 @@
         <field name="country_id" ref="base.us"/>
     </record>
     <data noupdate="1">
+        <!-- unchanged in 2021 - page 2 Table B - https://www.in.gov/dor/files/dn01.pdf -->
         <record id="rule_parameter_us_in_sit_dependent_exemption_rate_2020" model="hr.rule.parameter.value">
             <field name="parameter_value">{
                 'daily':          (  4.11,   8.22,  12.33,  16.44,  20.55),
diff --git a/l10n_us_hr_payroll/tests/test_us_in_indiana_payslip_2021.py b/l10n_us_hr_payroll/tests/test_us_in_indiana_payslip_2021.py
new file mode 100755
index 00000000..53b7ddf3
--- /dev/null
+++ b/l10n_us_hr_payroll/tests/test_us_in_indiana_payslip_2021.py
@@ -0,0 +1,36 @@
+# Part of Hibou Suite Professional. See LICENSE_PROFESSIONAL file for full copyright and licensing details.
+
+from datetime import date, timedelta
+from .common import TestUsPayslip
+
+
+class TestUsINPayslip(TestUsPayslip):
+    ###
+    #   2020 Taxes and Rates
+    ###
+    IN_UNEMP_MAX_WAGE = 9500.0
+    IN_UNEMP = 2.5
+    # Calculation based on https://www.in.gov/dor/files/dn01.pdf
+
+    def _test_sit(self, wage, additional_withholding, personal_exemption, dependent_exemption, schedule_pay,  date_start, expected_withholding):
+        employee = self._createEmployee()
+        contract = self._createContract(employee,
+                                        wage=wage,
+                                        state_id=self.get_us_state('IN'),
+                                        state_income_tax_additional_withholding=additional_withholding,
+                                        in_w4_sit_personal_exemption=personal_exemption,
+                                        in_w4_sit_dependent_exemption=dependent_exemption,
+                                        schedule_pay=schedule_pay)
+        payslip = self._createPayslip(employee, date_start, date_start + timedelta(days=7))
+        payslip.compute_sheet()
+        cats = self._getCategories(payslip)
+
+        self._log('Computed period tax: ' + str(expected_withholding))
+        self.assertPayrollEqual(cats.get('EE_US_SIT', 0.0), -expected_withholding)
+
+    def test_2020_taxes_example(self):
+        self._test_er_suta('IN', self.IN_UNEMP, date(2020, 1, 1), wage_base=self.IN_UNEMP_MAX_WAGE)
+        self._test_sit(800.0, 0.0, 5.0, 3.0, 'weekly', date(2020, 1, 1), 19.94)
+        self._test_sit(800.0, 10.0, 5.0, 3.0, 'weekly', date(2020, 1, 1), 29.94)
+        self._test_sit(9000.0, 0.0, 4.0, 3.0, 'monthly', date(2020, 1, 1), 267.82)
+        self._test_sit(10000.0, 0.0, 2.0, 2.0, 'bi-weekly', date(2020, 1, 1), 316.79)