Hey, yes, my accountant and I spoke with a couple of CRA agents and once I involved my Member of Parliament's office to help me with this issue, I got a call directly from the CRA guy who processed my return. Over the last year, I provided my 1040, W-2, IRS tax transcript for 2017-2020 years and details about the U.S.-Canada Tax Treaty convention. All of this resulted in CRA bringing down my amount owed from 75K to 22K for the year 2019. Then they reassessed my 2020 return and said I now owe them 35K. So I have been dealing with collection notices and calls asking me to pay over 57K in taxes.
Do you and others in a similar situation pay taxes in the U.S. and then pay additional amount to the CRA due to Canada's higher tax rates? In my situation I feel like I'm asked to pay over 55% in taxes when I add what I pay in the U.S. and what CRA says I should pay here in Canada. Seems unfair and unreasonable.
What is your situation....do you commute to work every day or are you full time remote?
You may have to file for refund from IRS and pay more taxes in Canada (rather all your taxes if CRA determines your work is being performed in Canada). Any way hire a good tax consultant or go for tax lawyers. May end up costing you more.
As I mentioned earlier, CRA would have been fine with just top up taxes few years back, increasingly they (not all CRA agents) are taking position that if you are working from Canada you need to pay majority of taxes in Canada.
So for future immigrants who are moving with jobs to Canada, better convert to contractor than have your payroll running in US, to avoid tax hassle.
For me I paid most of the taxes in US and paid some residual taxes in Canada. I was traveling Monday to Thursday for work, I did get reassessment but got resolved.