What Immer reads: the catalogue of official sources
This list is built from the catalogue the assistant actually searches, so it cannot drift from it. Each row is one source: a form family, a guide, an act or a set of bulletins, with how many documents it holds and the newest date among them.
In and out
- In: federal publications and those of every province and territory except Quebec — forms, guides, legislation, bulletins, folios and rate tables.
- Out: Quebec's own returns and taxes (TP-1, CO-17, QST), US returns, court decisions (CanLII is never downloaded) and accounting standards (the CPA Canada Handbook is copyrighted and is not included).
- Earlier editions stay in the catalogue for prior-year returns; an answer cites the edition for the year it is about.
72
sources
1,041
documents
13
jurisdictions
Federal
| Source | Type | Documents | Newest date |
|---|---|---|---|
| 5000-G Federal Income Tax and Benefit Guide | Guide | 1 | January 20, 2026 |
| AUT-01 Authorize a Representative for Offline Access | Forms | 1 | November 28, 2025 |
| Canada Pension Plan (R.S.C., 1985, c. C-8) | Legislation | 1 | September 21, 2026 |
| Canadian income tax rates and brackets for individuals | Rates | 1 | January 20, 2026 |
| CPP contribution rates, maximums and exemptions | Rates | 1 | October 31, 2025 |
| EI premium rates and maximums | Rates | 1 | September 16, 2025 |
| Employment Insurance Act (S.C. 1996, c. 23) | Legislation | 1 | September 21, 2026 |
| Excise Tax Act (GST/HST) (R.S.C., 1985, c. E-15) | Legislation | 1 | September 21, 2026 |
| GST/HST and provincial sales tax rates by province | Rates | 1 | June 9, 2026 |
| GST/HST notices | Bulletins | 60 | September 10, 2026 |
| GST/HST returns and election forms | Forms | 63 | September 21, 2026 |
| Income Tax Act (R.S.C., 1985, c. 1 (5th Supp.)) | Legislation | 1 | September 21, 2026 |
| Income Tax Folios | Folios | 33 | July 15, 2025 |
| Income tax package — index of all jurisdictions | Index | 1 | August 4, 2026 |
| Income Tax Regulations (C.R.C., c. 945) | Regulations | 1 | June 21, 2026 |
| Justice Laws consolidation index (Legis.xml) | Index | 1 | — |
| Keeping records — business topic pages | Guide | 8 | August 3, 2026 |
| P105 Students and Income Tax | Guide | 2 | May 6, 2026 |
| Prescribed interest rates | Rates | 1 | August 28, 2026 |
| Provincial and territorial corporation tax — CRA topic pages | Guide | 30 | May 13, 2026 |
| RC188 Keeping Records | Guide | 2 | January 31, 2011 |
| RC4022 General Information for GST/HST Registrants | Guide | 2 | January 7, 2026 |
| RC4064 Disability-Related Information | Guide | 2 | January 20, 2026 |
| T1 income tax package — non-residents and deemed residents (5013) | Forms | 20 | January 20, 2026 |
| T1-ADJ T1 Adjustment Request | Forms | 1 | September 9, 2026 |
| T2 Corporation Income Tax Return | Forms | 2 | May 4, 2026 |
| T2 schedules (all) | Forms | 283 | September 4, 2026 |
| T2125 Statement of Business or Professional Activities | Forms | 2 | February 9, 2026 |
| T2203 Provincial and Territorial Taxes — Multiple Jurisdictions | Forms | 2 | January 20, 2026 |
| T4001 Employers' Guide — Payroll Deductions and Remittances | Guide | 2 | January 21, 2026 |
| T4002 Self-employed Business, Professional, Commission, Farming and Fishing Income | Guide | 14 | April 16, 2026 |
| T4012 T2 Corporation Income Tax Guide | Guide | 13 | May 28, 2026 |
| T4032 Payroll Deductions Tables — all jurisdictions | Rates | 17 | June 15, 2026 |
| T4037 Capital Gains | Guide | 2 | February 11, 2026 |
| T4044 Employment Expenses | Guide | 2 | January 20, 2026 |
| T4127 Payroll Deductions Formulas | Guide | 5 | June 3, 2026 |
| T4130 Employers' Guide — Taxable Benefits and Allowances | Guide | 2 | August 17, 2026 |
| T776 Statement of Real Estate Rentals | Forms | 2 | February 10, 2026 |
| T777 Statement of Employment Expenses | Forms | 2 | February 26, 2026 |
| TD1 Personal Tax Credits Return — federal and provincial | Forms | 2 | August 31, 2026 |
| What's new for the current tax return | Guide | 1 | January 20, 2026 |
Alberta
| Source | Type | Documents | Newest date |
|---|---|---|---|
| Alberta — corporate income tax (AT1) | Guide | 1 | — |
| Alberta — personal income tax | Guide | 1 | — |
| T1 income tax package — Alberta (5009) | Forms | 19 | January 20, 2026 |
British Columbia
| Source | Type | Documents | Newest date |
|---|---|---|---|
| British Columbia — taxes | Guide | 1 | April 7, 2026 |
| British Columbia Employer Health Tax | Guide | 1 | June 17, 2026 |
| British Columbia PST bulletins and notices | Bulletins | 94 | — |
| T1 income tax package — British Columbia (5010) | Forms | 21 | January 20, 2026 |
Manitoba
| Source | Type | Documents | Newest date |
|---|---|---|---|
| Manitoba Health and Post Secondary Education Tax Levy | Guide | 1 | — |
| Manitoba Retail Sales Tax | Guide | 1 | — |
| Manitoba taxation bulletins | Bulletins | 93 | July 29, 2026 |
| T1 income tax package — Manitoba (5007) | Forms | 21 | January 20, 2026 |
New Brunswick
| Source | Type | Documents | Newest date |
|---|---|---|---|
| New Brunswick — taxes | Guide | 1 | September 29, 2026 |
| T1 income tax package — New Brunswick (5004) | Forms | 20 | January 20, 2026 |
Newfoundland and Labrador
| Source | Type | Documents | Newest date |
|---|---|---|---|
| Newfoundland and Labrador — tax programs and incentives | Guide | 1 | — |
| Newfoundland and Labrador Income Tax Act, 2000 | Legislation | 1 | — |
| T1 income tax package — Newfoundland and Labrador (5001) | Forms | 20 | January 20, 2026 |
Nova Scotia
| Source | Type | Documents | Newest date |
|---|---|---|---|
| Nova Scotia — taxation | Guide | 1 | — |
| Nova Scotia Income Tax Act | Legislation | 1 | — |
| T1 income tax package — Nova Scotia (5003) | Forms | 20 | January 20, 2026 |
Northwest Territories
| Source | Type | Documents | Newest date |
|---|---|---|---|
| Northwest Territories Income Tax Act | Legislation | 1 | — |
| Northwest Territories payroll tax | Guide | 1 | — |
| T1 income tax package — Northwest Territories (5012) | Forms | 20 | January 20, 2026 |
Nunavut
| Source | Type | Documents | Newest date |
|---|---|---|---|
| T1 income tax package — Nunavut (5014) | Forms | 20 | January 20, 2026 |
Ontario
| Source | Type | Documents | Newest date |
|---|---|---|---|
| Ontario — taxes and benefits | Guide | 1 | — |
| Ontario Employer Health Tax | Guide | 1 | — |
| Ontario Taxation Act, 2007 | Legislation | 1 | — |
| T1 income tax package — Ontario (5006) | Forms | 24 | January 20, 2026 |
Prince Edward Island
| Source | Type | Documents | Newest date |
|---|---|---|---|
| T1 income tax package — Prince Edward Island (5002) | Forms | 19 | January 20, 2026 |
Saskatchewan
| Source | Type | Documents | Newest date |
|---|---|---|---|
| Saskatchewan — taxes, licensing and reporting | Guide | 1 | — |
| T1 income tax package — Saskatchewan (5008) | Forms | 21 | January 20, 2026 |
Yukon
| Source | Type | Documents | Newest date |
|---|---|---|---|
| T1 income tax package — Yukon (5011) | Forms | 22 | January 20, 2026 |
This page explains official publications in plain words. It is informational, not professional advice, and it is not a substitute for the documents it cites: open the source before you rely on it.
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