> ## Documentation Index > Fetch the complete documentation index at: https://docs.nmbr.co/llms.txt > Use this file to discover all available pages before exploring further. # Retrieve a form type > Endpoint to fetch the structure of a Form. The following example is for a 2026 TD1, but the response `fields` will differ depending on the specific Form instance requested. ## OpenAPI ````yaml /spec/openapi.json get /form_types/{form_type} openapi: 3.0.0 info: title: Nmbr API description: API to interact with Nmbr Payroll version: 1.0.0 servers: - url: https://sandbox.nmbr.co/services/payroll security: - CompanyToken: [] tags: - name: Accounting Codes - name: Accounting Code Rules - name: Adjustments - name: Allowances - name: Allowance Line Items - name: Allowance Types - name: Async Tasks - name: Bank Accounts - name: Business Entities - name: Business Entity Verifications - name: Business Entity ROE Authorizations - name: Business Presets - name: Calculations - name: Companies - name: Contractors - name: Deductions - name: Deduction Line Items - name: Deduction Types - name: Earnings - name: Earning Line Items - name: Earning Types - name: Effective Tax Properties - name: Employees - name: Employee Benefits - name: Employee Benefit Line Items - name: Employee Benefit Types - name: Employer Benefits - name: Employer Benefit Line Items - name: Employer Benefit Types - name: Employer Statutory Withholding Line Items - name: Employer Statutory Withholding Types - name: Forms - name: Form Batches - name: Form Types - name: Holidays - name: Integrations - name: Journal Entries - name: Overtime Rates - name: Partners - name: Pay Rates - name: Pay Schedules - name: Pay Splits - name: Pay Stubs - name: Payments - name: Payrolls - name: Reimbursements - name: Reimbursement Line Items - name: Reimbursement Types - name: Remittance Accounts - name: Remittance Account Enrollments - name: Reports - name: Statutory Withholding Line Items - name: Statutory Withholding Types - name: Tags - name: Tag Groups - name: Tax Properties - name: Tax Property Templates - name: Tokens - name: Usage Records - name: Usage Summaries - name: Vacation Pay - name: Vacation Pay Settings - name: Webhooks - name: Work Assignments paths: /form_types/{form_type}: get: tags: - Form Types summary: Retrieve a form type description: >- Endpoint to fetch the structure of a Form. The following example is for a 2026 TD1, but the response `fields` will differ depending on the specific Form instance requested. operationId: form-types-show parameters: - name: form_type in: path schema: type: string required: true - name: effective_date in: query schema: type: string format: date required: false responses: '200': description: OK content: application/json: schema: type: object properties: id: type: string description: The unique identifier of the object in Nmbr. readOnly: true object: type: string description: The type of the object in Nmbr (`"form_type"`). readOnly: true data: $ref: '#/components/schemas/FormType' example: id: object: form_type data: type: td1 label: TD1 Personal Tax Credits Return version_year: 2026 version_month: january owner_types: - work_assignment exportable_as: [] supports_population: false supports_generation: false fields: - key: line_1_basic_personal_amount label: Basic Personal Amount (Line 1) type: currency required: false readonly: false - key: line_2_infirm_children_caregiver_amount label: Infirm Children Caregiver Amount (Line 2) type: currency required: false readonly: false - key: line_3_age_amount label: Age Amount (Line 3) type: currency required: false readonly: false - key: line_4_pension_income_amount label: Pension Income Amount (Line 4) type: currency required: false readonly: false - key: line_5_tuition label: Tuition (Line 5) type: currency required: false readonly: false - key: line_6_disability_amount label: Disability Amount (Line 6) type: currency required: false readonly: false - key: line_7_spouse_or_common_law_partner_amount label: Spouse or Common-law Partner Amount (Line 7) type: currency required: false readonly: false - key: line_8_eligible_dependent_amount label: Eligible Dependent Amount (Line 8) type: currency required: false readonly: false - key: line_9_infirm_dependent_caregiver_amount label: Infirm Dependent Caregiver Amount (Line 9) type: currency required: false readonly: false - key: line_10_dependent_caregiver_amount label: Dependent Caregiver Amount (Line 10) type: currency required: false readonly: false - key: line_11_spouse_or_common_law_transfer_amount label: Spouse or Common-law Transfer Amount (Line 11) type: currency required: false readonly: false - key: line_12_dependent_transfer_amount label: Dependent Transfer Amount (Line 12) type: currency required: false readonly: false - key: line_13_total_claim_amount label: Total Claim Amount (Line 13) type: currency required: false readonly: false - key: more_than_one_employer_or_payer label: You have more than one employer or payer type: boolean required: false readonly: false - key: total_income_less_than_total_claim_amount label: Total income is less than total claim amount type: boolean required: false readonly: false - key: ninety_percent_world_income_taxable_income label: 90% of World Income is Taxable in Canada type: boolean required: false readonly: false - key: prescribed_zone_deduction label: Prescribed Zone Deduction type: currency required: false readonly: false - key: additional_tax_deduction label: Additional Tax Deduction type: currency required: false readonly: false links: self: /form_types/td1 components: schemas: FormType: type: object title: Form Type properties: type: type: string description: The string identifier for this form type. nullable: true enum: - rl1 - roe - t4 - t4a - td1 - td1ab - td1bc - td1mb - td1nb - td1nl - td1ns - td1nt - td1nu - td1on - td1pe - td1sk - td1x - td1yt - tp_1015_3_v - tp_1015_r_13_v label: type: string description: The human-readable display name for this form type. nullable: true version_year: type: number nullable: true format: decimal version_month: type: string nullable: true owner_types: type: array description: The owner types that can have forms of this type. nullable: true items: type: string exportable_as: type: object nullable: true supports_population: type: boolean supports_generation: type: boolean fields: type: array nullable: true items: type: object properties: key: type: string nullable: true label: type: string nullable: true type: type: string nullable: true enum: - rl1 - roe - t4 - t4a - td1 - td1ab - td1bc - td1mb - td1nb - td1nl - td1ns - td1nt - td1nu - td1on - td1pe - td1sk - td1x - td1yt - tp_1015_3_v - tp_1015_r_13_v required: type: boolean readonly: type: boolean securitySchemes: CompanyToken: type: http scheme: bearer ````