Serbinski Accounting Firms

Assuming you do not begin renting it out after moving, your assessment of US taxes is correct, IF your overall gain is less that the $250K/500K exemption.

For Cdn purposes, your cost basis for the home is the value on the day you leave, so selling a few weeks/months after moving should result in ...

I know of no such form, in either US or Canada, and even if there was, I do not believe it would impact your taxes in year of sale.

As long s you have a good valuation from the time you left canada/began renting, the taxes are quite straight forward.
For Canada you get an extra year of principle residence exclusion in calculating your overall gain. (ie. if you left 6 years ago, you only count 5 years as taxable gain bases on ...

As a US resident, the gains on stocks -- even Cdn ones -- are not subject to Cdn taxation, so giving them to a Cdn resident, incurs no Cdn tax to them or you. Their cost basis becomes the market price on the day you gift them. Nothing for you to report in Canada.

Mine worked in March

Assuming none of it is US real estate or resource investments, you should be able to -- either by using the treaty or by simply using foreign tax credits -- to avoid any US tax on this gain.

Despite having a house and spouse in canada, it is possible to become a "deemed" or "treaty non-resident", but only if you minimize/restrict your visits back to Canada, and rather have your spouse visit you. Barring that, you will be considered as having never left Canada, remaining a tax resident ...

All your contributions go in box 1.

You would report the total of both contributions.
They are both employer-sponsored plans, so qualify for inclusion on RC268.

It would be wise to include it on your FBAR as a jointly held account -- and your probably filing FBAR anyways -- since you do have a measure of control over it. Just like a joint bank account that you do not fund, I would not consider it one of your assets for FATCA purposes.

To be a "deemed" non-resident, requires that you not merely "say" that you are more resident of US than canada, but prove it by the treaty.

I don't believe you can, from what you have described, Your center of vital interest, in my opinion, is where you spend time with your family. You spend NO ...

Does your spouse identify that she is married on her Cdn return, and does she report your US income on page one, for determining benefits?

I would opine that because you spend more time in canada than US, AND that your family lives in Canada, with whom you live, particularly since you do this year-after-year, you would be considered a resident of Canada, by the treaty tie-breakers.

You can keep your TFSA with most brokerages, although there is little benefit for doing so while in US.

Your investment account cannot be managed while in US, as this violates SEC regulations, because Cdn brokerages cannot deal with US residents in non-sheltered accounts.
You are best off ...

It would be better if you could fix it, as it is impacting the performance of your IRA.

However, simply keep track of the Cdn tax withheld, and include it on your Cdn tax return along with any other withholding, so it isn't "lost".