diff --git a/l10n_us_hr_payroll/data/state/nc_northcarolina.xml b/l10n_us_hr_payroll/data/state/nc_northcarolina.xml
index 597fd543..d09f8e3f 100644
--- a/l10n_us_hr_payroll/data/state/nc_northcarolina.xml
+++ b/l10n_us_hr_payroll/data/state/nc_northcarolina.xml
@@ -44,6 +44,8 @@
         <field name="country_id" ref="base.us"/>
     </record>
     <data noupdate="1">
+        <!-- https://files.nc.gov/ncdor/documents/files/NC-30_book_Web_1-16-19_v4_Final.pdf -->
+        <!-- Allowance Table  Page 19. + SD For single or married + SD for Head of household (SD Page. 16-18)-->
         <record id="rule_parameter_us_nc_sit_allowance_rate_2019" model="hr.rule.parameter.value">
             <field name="parameter_value">{
                 'weekly':        {'allowance':  48.08, 'standard_deduction': 192.31, 'standard_deduction_hh':  288.46},
@@ -54,10 +56,12 @@
             <field name="rule_parameter_id" ref="rule_parameter_us_nc_sit_allowance_rate"/>
             <field name="date_from" eval="datetime(2019, 1, 1).date()"/>
         </record>
+        <!-- https://files.nc.gov/ncdor/documents/files/2020-NC-30_Final.pdf -->
+        <!-- Allowance Table  Page 19. + SD For single or married + SD for Head of household (SD Page. 16-18)-->
         <record id="rule_parameter_us_nc_sit_allowance_rate_2020" model="hr.rule.parameter.value">
             <field name="parameter_value">{
-                'weekly':         {'allowance': 48.08, 'standard_deduction': 206.73, 'standard_deduction_hh':  310.10},
-                'bi-weekly':      {'allowance': 96.15, 'standard_deduction': 413.46, 'standard_deduction_hh':  620.19},
+                'weekly':        {'allowance':  48.08, 'standard_deduction': 206.73, 'standard_deduction_hh':  310.10},
+                'bi-weekly':     {'allowance':  96.15, 'standard_deduction': 413.46, 'standard_deduction_hh':  620.19},
                 'semi-monthly':  {'allowance': 104.17, 'standard_deduction': 447.92, 'standard_deduction_hh':  671.88},
                 'monthly':       {'allowance': 208.33, 'standard_deduction': 895.83, 'standard_deduction_hh': 1343.75},
             }</field>
diff --git a/l10n_us_hr_payroll/models/us_payroll_config.py b/l10n_us_hr_payroll/models/us_payroll_config.py
index 7b8fd2ed..82ebe623 100644
--- a/l10n_us_hr_payroll/models/us_payroll_config.py
+++ b/l10n_us_hr_payroll/models/us_payroll_config.py
@@ -190,7 +190,6 @@ class HRContractUSPayrollConfig(models.Model):
         ('', 'Exempt'),
         ('single', 'Single'),
         ('married', 'Married'),
-        ('surviving_spouse', 'Surviving Spouse'),
         ('head_household', 'Head of Household')
     ], string='North Carolina NC-4 Filing Status', help='NC-4')
     nc_nc4_sit_allowances = fields.Integer(string='North Carolina NC-4 Allowances', help='NC-4 1.')
diff --git a/l10n_us_hr_payroll/tests/test_us_nc_northcarolina_payslip_2020.py b/l10n_us_hr_payroll/tests/test_us_nc_northcarolina_payslip_2020.py
index 2c484ac4..8e2d69c1 100755
--- a/l10n_us_hr_payroll/tests/test_us_nc_northcarolina_payslip_2020.py
+++ b/l10n_us_hr_payroll/tests/test_us_nc_northcarolina_payslip_2020.py
@@ -11,7 +11,7 @@ class TestUsNCPayslip(TestUsPayslip):
     NC_UNEMP_MAX_WAGE = 25200.0
     NC_UNEMP = 1.0
     NC_INC_TAX = 0.0535
-
+    # Example based on https://files.nc.gov/ncdor/documents/files/NC-30_book_Web_1-16-19_v4_Final.pdf 
     def _test_sit(self, wage, filing_status, allowances, additional_withholding, schedule_pay, date_start, expected_withholding):
 
         employee = self._createEmployee()
@@ -34,3 +34,4 @@ class TestUsNCPayslip(TestUsPayslip):
         self._test_sit(20000.0, 'single', 1, 100.0, 'weekly', date(2020, 1, 1), 1156.0)
         self._test_sit(5000.0, 'married', 1, 0.0, 'weekly', date(2020, 1, 1), 254.0)
         self._test_sit(4000.0, 'head_household', 1, 5.0, 'semi-monthly', date(2020, 1, 1), 177.0)
+        self._test_sit(7000.0, '', 1, 5.0, 'monthly', date(2020, 1, 1), 0.0)