https://www.canada.ca/en/reven.....ckage.html

Norman1 said
Some schedules are no longer included and will have to be ordered separately: 

Gotta keep remembering to order the Capital Gains schedule 3

"The Canada Revenue Agency (CRA) will permanently close all drop boxes currently available at 45 locations across Canada on May 29, 2026. This change will take place after the 2026 tax filing season to minimize disruption for taxpayers."

CRA drop boxes to permanently close after 2026 tax filing season

One will need to order it as CRA will no longer mail the package out automatically. Some schedules are no longer included and will have to be ordered separately:

If you need a tax package by mail

Starting with the 2025 tax year, the Canada Revenue Agency (CRA) will no longer automatically mail the income tax package to certain individuals. Some federal and provincial or territorial schedules have also been removed from the mailed tax package. …

So, I went to our local CRA office at 1 Front Street Toronto to pick up a T1 package and all the doors were closed. Does the T1 package still exist for 2025 tax returns?

If one didn't pay by April 30 and CRA issues the notice of assessment on May 15, the notice may say pay amount owing and interest by June 1 to avoid additional interest. One still needs to pay interest for May 1 to 15.

If one also does not pay by June 1, then one will owe interest from May 1 to when one pays instead of from May 1 to 15.

CRA likely does that to recognize that Canada Post does not deliver the notices to the taxpayer the same day they are issued.

The Canada Revenue Agency (CRA) specifies April 30 as the legal deadline for filing and paying taxes to avoid penalties. The later date (e.g., mid-May) sometimes seen on a Notice of Assessment (NOA) is a "grace period" buffer to account for processing time, allowing taxpayers to pay the calculated balance without additional interest accruing after April 30, provided they filed on time.

Key Takeaways:
Official Deadline: April 30 is the legal deadline for payment, as noted by the CRA on Facebook.
The Buffer Date: The later date on your NOA is simply the date by which the CRA guarantees no extra interest will be added, as outlined in Understanding Interest on Canada.ca.
Risk Mitigation: The best way to avoid all penalties is to file and pay on or before April 30. If you cannot pay, filing on time prevents the 5% late-filing penalty.
Self-Employed: While you have until June 15 to file, any balance owing is still due by April 30.

In short: Always aim for April 30. The later date is a courtesy buffer if your assessment was finalized late, not a new official deadline.

But after filing taxes CRA site says: To avoid additional interest charges please pay by May 13, 2026.

So who is right and why this new due date is here?
Anybody ever paid taxes due after end of April without paying fine + interest (personal tax, not business or whatnot)?

Actually if CRA ultimately succeeds in 'doing simple returns' for a considerable number of taxpayers, that would likely cover off a lot of returns that are not T1 Finals. There were just over 2 million paper filings last year, so other than some paper T1 Finals, it would be interesting to know the profiles of the bulk of the paper filings.

I'd give it another 2-3 years, and the CRA will most likely Nix the Paper returns, altogether.

'Gone' - just like the Dodo Bird . . .

Dean

Each year, CRA T1 filing statistics show a somewhat steady decline in paper returns being submitted. It is not worth the cost to make paper packages available any more.

I did my tax return in a few hours at my desk and netfiled thereafter and got my NOA from MyAccount in minutes thereafter.