schedule18

T2 Corporation Income Tax Return

Kind

batch

Supported tax years

2019 and later

Strict profile

s18_2025_six_line_projection_v1

Payload schema version

0.10.0

Dependencies (run automatically)

division_c, part_i_tax, schedule31, schedule4, schedule5, schedule6

Example request

Send this body to POST /api/v1/computations/batch. It satisfies the strict profile, so it works with or without the payloadContract selector.

{
  "compute": [
    "schedule18"
  ],
  "inputs": {
    "taxYear": 2025,
    "fiscalStart": "2025-01-01",
    "fiscalEnd": "2025-12-31",
    "daysInYear": 365,
    "t2Jacket": {
      "additionalInfo": {
        "returnFiledWithinThreeYears": true
      },
      "filingStatus": {
        "firstYearAfterIncorporation": false,
        "firstYearAfterAmalgamation": false,
        "subsidiaryWindupS88": false
      }
    },
    "schedule18": {
      "line120_taxed_capital_gains": 1000,
      "line160_rcgtoh_before_refund": 500,
      "line190_federal_capital_gains_refund": 100,
      "line260_ontario_capital_gains_refund": 0,
      "line262_manitoba_capital_gains_refund": 0,
      "line290_total_provincial_capital_gains_refund": 0,
      "totalTaxableIncome": 1000,
      "perProvinceRows": {}
    },
    "isCCPC": true
  }
}

Input cells (52)

Paths are relative to the request’s inputs object; [] marks an array element.

Required says when a cell must be present. Always means every request needs it: the default boundary rejects the call when the cell is omitted or null. Strict means only a request that sends this target’s payloadContract selector needs it. See Run computations for the default boundary.

These cells are everything this target accepts. A member that is not published here, or is sent with the wrong JSON type, fails the call with a 400 naming each failing cell.

Output cells (74)

Paths are relative to this target’s result object in the response.