suite/l10n_us_ms_hr_payroll/data/rules.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>

<!-- HR SALARY RULES-->
    <record id="hr_payroll_rules_ms_unemp_wages" model="hr.salary.rule">
        <field name="sequence" eval="423"/>
        <field name="category_id" ref="hr_payroll_ms_unemp_wages"/>
        <field name="name">Wage: US-MS Unemployment</field>
        <field name="code">WAGE_US_MS_UNEMP</field>
        <field name="condition_select">python</field>
        <field name="condition_python">result = (contract.futa_type != contract.FUTA_TYPE_BASIC)</field>
        <field name="amount_select">code</field>
        <field name="amount_python_compute">
###
year = payslip.dict.date_to.year
rate = payslip.dict.get_rate('US_MS_UNEMP')
ytd = payslip.sum('WAGE_US_MS_UNEMP', str(year) + '-01-01', str(year+1) + '-01-01')
ytd += contract.external_wages
remaining = rate.wage_limit_year - ytd
if remaining &lt;= 0.0:
    result = 0
elif remaining &lt; categories.BASIC:
    result = remaining
else:
    result = categories.BASIC
        </field>
        <field name="appears_on_payslip" eval="False"/>
    </record>
    <record id="hr_payroll_rules_ms_unemp" model="hr.salary.rule">
        <field name="sequence" eval="443"/>
        <field name="category_id" ref="hr_payroll_ms_unemp"/>
        <field name="name">ER: US-MS Unemployment</field>
        <field name="code">ER_US_MS_UNEMP</field>
        <field name="condition_select">python</field>
        <field name="condition_python">result = (contract.futa_type != contract.FUTA_TYPE_BASIC)</field>
        <field name="amount_select">code</field>
        <field name="amount_python_compute">
rate = payslip.dict.get_rate('US_MS_UNEMP')
result_rate = -rate.rate
result = categories.WAGE_US_MS_UNEMP

# result_rate of 0 implies 100% due to bug
if result_rate == 0.0:
    result = 0.0
        </field>
        <field name="register_id" ref="contrib_register_msdor_unemp"/>
        <field name="appears_on_payslip" eval="False"/>
    </record>

    <record id="hr_payroll_rules_ms_inc_withhold" model="hr.salary.rule">
        <field name="sequence" eval="145"/>
        <field name="category_id" ref="hr_payroll_ms_income_withhold"/>
        <field name="name">EE: US-MS Income Withholding</field>
        <field name="code">EE_US_MS_INC_WITHHOLD</field>
        <field name="condition_select">python</field>
        <field name="condition_python">result = contract.ms_89_350_filing_status</field>
        <field name="amount_select">code</field>
        <field name="amount_python_compute">
year = payslip.dict.date_to.year
filing_status = contract.ms_89_350_filing_status
schedule_pay = contract.schedule_pay
PPAY = categories.GROSS
EX = contract.ms_89_350_exemption
additional = contract.ms_89_350_additional_withholding

STDED = 0.0

PP = 0
if 'weekly' == schedule_pay:
    PP = 52
elif 'bi-weekly' == schedule_pay:
    PP = 26
elif 'semi-monthly' == schedule_pay:
    PP = 24
elif 'monthly' == schedule_pay:
    PP = 12
elif 'quarterly' == schedule_pay:
    PP = 4
elif 'semi-annually' == schedule_pay:
    PP = 2
elif 'annually' == schedule_pay:
    PP = 1
else:
    raise Exception('Invalid schedule_pay="' + schedule_pay + '" for MO Income Withholding calculation')

AGP = PPAY * PP

if year == 2019 or True:
    if filing_status == 'single':
        STDED = 2300.0
    elif filing_status == 'head_of_household':
        STDED = 3400.0
    elif filing_status == 'married_dual':
        STDED = 2300.0
    elif filing_status == 'married':
        STDED = 4600.0

    bracket = [
        (10000.0, 0.05, 290.0),
        (5000.0, 0.04, 90.0),
        (2000.0, 0.03, 0.0),
    ]


TI = AGP - (EX + STDED)
if TI &lt;= 0.01:
    result = 0.0
else:
    for data in bracket:
        if TI >= data[0]:
            TAX = ((TI - data[0]) * data[1]) + data[2]
            break
    else:
        TAX = 0.0

    result = round(TAX / PP)

result += additional
result = -result
        </field>
        <field name="register_id" ref="contrib_register_msdor_withhold"/>
    </record>

</odoo>