IMP l10n_us_hr_payroll Port l10n_us_ca_hr_payroll CA California including migration

l10n_us_hr_payroll/models/state/ca_california.py

@@ -0,0 +1,98 @@
+# Part of Hibou Suite Professional. See LICENSE_PROFESSIONAL file for full copyright and licensing details.
+
+from .general import _state_applies, sit_wage
+
+MAX_ALLOWANCES = 10
+
+
+def ca_california_state_income_withholding(payslip, categories, worked_days, inputs):
+    """
+    Returns SIT eligible wage and rate.
+
+    :return: result, result_rate (wage, percent)
+    """
+
+    state_code = 'CA'
+    if not _state_applies(payslip, state_code):
+        return 0.0, 0.0
+
+    # Determine Wage
+    wage = sit_wage(payslip, categories)
+    if not wage:
+        return 0.0, 0.0
+
+    filing_status = payslip.contract_id.us_payroll_config_value('ca_de4_sit_filing_status')
+    if not filing_status:
+        return 0.0, 0.0
+
+    schedule_pay = payslip.contract_id.schedule_pay
+    additional = payslip.contract_id.us_payroll_config_value('state_income_tax_additional_withholding')
+    sit_allowances = payslip.contract_id.us_payroll_config_value('ca_de4_sit_allowances')
+    additional_allowances = payslip.contract_id.us_payroll_config_value('ca_de4_sit_additional_allowances')
+    low_income_exemption = payslip.rule_parameter('us_ca_sit_income_exemption_rate')[schedule_pay]
+    estimated_deduction = payslip.rule_parameter('us_ca_sit_estimated_deduction_rate')[schedule_pay]
+    tax_table = payslip.rule_parameter('us_ca_sit_tax_rate')[filing_status].get(schedule_pay)
+    standard_deduction = payslip.rule_parameter('us_ca_sit_standard_deduction_rate')[schedule_pay]
+    exemption_allowances = payslip.rule_parameter('us_ca_sit_exemption_allowance_rate')[schedule_pay]
+
+    low_income = False
+    if filing_status == 'head_household':
+        _, _, _, income = low_income_exemption
+        if wage <= income:
+            low_income = True
+    elif filing_status == 'married':
+        if sit_allowances >= 2:
+            _, _, income, _ = low_income_exemption
+            if wage <= income:
+                low_income = True
+        else:
+            _, income, _, _ = low_income_exemption
+            if wage <= income:
+                low_income = True
+    else:
+        income, _, _, _ = low_income_exemption
+        if wage <= income:
+            low_income = True
+
+    withholding = 0.0
+    taxable_wage = wage
+    if not low_income:
+        allowance_index = max(additional_allowances - 1, 0)
+        if additional_allowances > MAX_ALLOWANCES:
+            deduction = (estimated_deduction[0] * additional_allowances)
+            taxable_wage -= deduction
+        elif additional_allowances > 0:
+            deduction = estimated_deduction[allowance_index]
+            taxable_wage -= deduction
+
+        if filing_status == 'head_household':
+            _, _, _, deduction = standard_deduction
+            taxable_wage -= deduction
+        elif filing_status == 'married':
+            if sit_allowances >= 2:
+                _, _, deduction, _ = standard_deduction
+                taxable_wage -= deduction
+            else:
+                _, deduction, _, _ = standard_deduction
+                taxable_wage -= deduction
+        else:
+            deduction, _, _, _ = standard_deduction
+            taxable_wage -= deduction
+
+        over = 0.0
+        for row in tax_table:
+            if taxable_wage <= row[0]:
+                withholding = ((taxable_wage - over) * row[1]) + row[2]
+                break
+            over = row[0]
+
+        allowance_index = sit_allowances - 1
+        if sit_allowances > MAX_ALLOWANCES:
+            deduction = exemption_allowances[0] * sit_allowances
+            withholding -= deduction
+        elif sit_allowances > 0:
+            deduction = exemption_allowances[allowance_index]
+            withholding -= deduction
+
+    withholding += additional
+    return wage, -((withholding / wage) * 100.0)