Use ChatGPT for your Canadian taxes without sharing your SIN
AI can explain a CRA letter, walk you through which slip goes where, or sanity-check your RRSP math. Every one of those documents has your Social Insurance Number on it. The AI doesn't need it.
What people ask AI at tax time
- "What does box 52 on my T4 mean?"
- "I got this Notice of Reassessment. Why do I owe money?"
- "Should I put this year's room into my RRSP or TFSA?"
- "Which of these receipts can I claim as moving or medical expenses?"
T4s, T5s, RRSP receipts and CRA letters carry your SIN, full name and home address. Your SIN is the one number the government tells you to share only when legally required. A chat window isn't that.
What the AI actually needs
Box numbers, amounts, dates and your question.
Box 14 Employment income: 68,400.00 · Box 52 Pension adjustment: 4,120.00
Employee: #PERSON_1 · SIN #ID_NUMBER_1
Box 14 Employment income: 68,400.00 · Box 52 Pension adjustment: 4,120.00
The AI can still explain that the pension adjustment reduces next year's RRSP room, and by how much. It just doesn't know whose T4 it is.
How to do it with Hushtag
- Copy the text from your slip, CRA My Account letter or receipt. (For a PDF, see our PDF guide.)
- Paste into ChatGPT, Claude or Gemini with Hushtag on. SINs, names, addresses, postal codes and account numbers become hashtags before the site receives them.
- Ask your question.
- Press Alt+Shift+S to read the answer with your details restored, on your screen only.
Doing a family's returns? Each person gets their own hashtag (#PERSON_1, #PERSON_2), so the AI can say "#PERSON_2 should claim the medical expenses" without knowing anyone's name.
Honest limits
- Hushtag hides who you are, not your income. Amounts go through because the AI needs them.
- Hushtag recognizes SINs by their format and check digit. A number typed with unusual spacing may slip through, so glance at the "hushed" note.
- Never let an AI file for you or log into CRA My Account. Use it to understand, then do the filing yourself or with a pro.
Try it on a T4
Paste a slip into the free web version and see your SIN turn into a hashtag. Nothing is uploaded and there's no account.