I paid my 2018 BC property taxes in March 2019. Can I claim the against my 2018 rental income, even if the tax was paid in 2019?

The property tax was all associated with the 1 rental property. My concern is that I paid the 2018 taxes in 2019 (it was a late payment), and I would like to claim it on my 2018 return. Not sure if I can claim it on my 2018 return since I paid in 2019, or if I have to claim it on my 2019 return next year.

Investors and rental owners

You claim your property taxes for the year they relate to. So even if you didn't  pay your 2018 taxes until 2019, you still claim them on the 2018 tax return.