What Schedule CT21 taxable capital asks for — and how to autofill 013-1539 with my-id.ca
Report associated corporations taxable capital on CT21 without retyping entity details
Associated corporations reporting taxable capital on Schedule CT21 repeat legal name, business number, mailing address, and capital allocation particulars on every Ontario corporation tax package. This guide is an example of storing them once in my-id.ca.
Official form and source
Start from the official source and always use the current version — form numbers and links can change:
- Service page: Corporations tax forms and publications — ontario.ca
- Form (Central Forms Repository): Taxable Capital of Associated Corporations Schedule CT21 — 013-1539
What this form is about
Form 013-1539 is Schedule CT21 — Taxable Capital of Associated Corporations — filed with Ontario corporation income tax — confirm rules on ontario.ca.
Before you start: what to gather
- Corporation legal name and mailing address for each associated corporation.
- Business numbers and Ontario tax account identifiers.
- Taxable capital amounts and allocation records.
- Authorized representative name, phone, and email.
Confirm the current process on ontario.ca.
How my-id.ca makes it faster
- Save it once. Store your corporation names, addresses, and business numbers in your my-id.ca profile.
- Keep documents ready. Upload supporting documents to my-id.ca Files so you are not searching at form time.
- Autofill the form. Use the my-id.ca Chrome extension on a web form, or fill a PDF from your saved profile inside my-id.ca.
- Review and submit yourself through the official channel.
Why do it in my-id.ca
Related Ontario forms repeat the same personal details. Captured once in my-id.ca — stored in Canada, with AI on its own servers — every form starts mostly complete.
Frequently asked questions
- Who files Schedule CT21?
- Associated corporations with Ontario taxable capital reporting — confirm on ontario.ca.
- How does my-id.ca help?
- It autofills corporation names, addresses, and business numbers.
- How does 013-1539 relate to form 013-1480?
- Form 013-1480 is Schedule CT22; 013-1539 is Schedule CT21 — confirm which schedule applies.
Fill it once. Reuse it everywhere.
Save your information in my-id.ca once, then autofill this form and the next one — web forms with the Chrome extension, PDFs right in the app. Your data is stored in Canada and AI runs on my-id.ca's own servers, never sent to third-party AI providers.