British Columbia Pension Income Amount

Fixes #470

changelog_entry.yaml

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+- bump: minor
+  changes:
+    added:
+    - British Columbia pension income amount. 

policyengine_canada/parameters/gov/provinces/bc/tax/income/credits/pension_income_amount/cap.yaml

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+description: British Columbia provides this maximum pension benefit.
+values:
+  2022-01-01: 1_000
+metadata:
+  unit: currency-CAD
+  label: British Columbia pension benefit max amount
+  reference:
+  - title: 2023 British Columbia Personal Tax Credits Return, TD1BC
+    href: https://www.canada.ca/content/dam/cra-arc/formspubs/pbg/td1bc/td1bc-23e.pdf#page=1
+  - title: British Columbia Income Tax Act § 4.32
+    href: https://www.bclaws.gov.bc.ca/civix/document/id/complete/statreg/96215_00_multi#section4.32

policyengine_canada/tests/gov/provinces/bc/tax/income/credits/bc_pension_income_amount/bc_pension_income_amount.yaml

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+- name: Max Pension Benefit 
+  period: 2023
+  input:
+    province_code: BC
+    pension_and_savings_plan_income: 1_001
+  output:
+    bc_pension_income_amount: 1_000
+
+- name: Pension Benefit Below Maximum Amount
+  period: 2023
+  input:
+    province_code: BC
+    pension_and_savings_plan_income: 800
+  output:
+    bc_pension_income_amount: 800

policyengine_canada/variables/gov/provinces/bc/tax/income/credits/pension_income_amount/bc_pension_income_amount.py

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+from policyengine_canada.model_api import *
+
+
+class bc_pension_income_amount(Variable):
+    value_type = float
+    entity = Person
+    label = "British Columbia pension income amount"
+    unit = CAD
+    definition_period = YEAR
+    defined_for = ProvinceCode.BC
+
+    def formula(person, period, parameters):
+        pension_income = person("pension_and_savings_plan_income", period)
+        max_amount = parameters(
+            period
+        ).gov.provinces.bc.tax.income.credits.pension_income_amount.cap
+        # Capped at a certain amount
+        return min_(max_amount, pension_income)