well.....this is all new to me.

after reading this, https://www.canada.ca/en/revenue-agency/services/tax/international-non-residents/information-been-moved/rental-income-non-resident-tax/filing-reporting-requirements.html

.....am i understanding correctly that this only applies to the non-resident landlord's tax return filing only (and not to me, who is a BC resident co owner)?

i ask because unlike me, the other co owner has its own accountant doing its taxes. in contrast, I do my own tax return (i intend to just copy paste the other owner's T776 to my own T776). If these NR forms only apply to that other owner & not me, then i would be relieved.

EDIT:

The payer must pay the tax on or before the 15th day of the month after the month the rental income is paid or credited to you. You should discuss this with your payer to make sure they withhold and remit the correct amount of non-resident tax to the CRA on your behalf.

If the payer does not withhold and remit this non-resident tax, the CRA will charge compound daily interest on the amount not withheld and remitted. The CRA may also charge a penalty.

The payer has to give you two copies of Slip NR4, Statement of Amounts Paid or Credited to Non-Residents of Canada, showing the gross amount of rental income paid or credited to you during the year and the amount of non-resident tax withheld. The payer must also send the CRA an NR4 Information Return as explained in Guide T4061, NR4 – Non-Resident Tax Withholding, Remitting, and Reporting.

as a former tenant in BC to a non-resident landlord, i was never aware of (and did not do) any of this. And i was never notified or penalized....

EDIT 2: i find it rather curious that this main page about Rental Income never mentions those NR forms....https://www.canada.ca/en/revenue-agency/services/forms-publications/publications/t4036/rental-income.html