How do I file my 2022 USA tax return as a Canadian who has never filed? In 2022 I had investment income through a bank in the USA. No other income in the USA.

[Critter-3]

http://blog.turbotax.intuit.com/2014/04/08/turbotax-and-sprintax-now-make-filing-easier-for-non-resi...

[pk]

@scullyda , the taxation of  US sourced  income  of a person  ( for US purposes ) , depends on immigration status of the person. 

If I assume that you are Non-Resident Alien, then passive earnings like  dividend  and interest are generally at a flat 30% and reported using form 1040-NR ( not supported by TurboTax  -- suggest using  SprinTax or local tax professional familiar with US-Canda tax treaty ).

However , in case of a Canadian residents whom are not US persons, the Tax Treaty modifies this flat rate.   Please see  US-Canada Tax Treaty  articles  X, XI, XII and XIII.   You can see the treaty  >>Canada - Tax Treaty Documents | Internal Revenue Service (irs.gov)   ,CANADAWEB.PDF (irs.gov)

Hope this helps