I forgot to declare my Indian bank interest, can I fix it?
Often yes, and doing it voluntarily is the better way. India provides a route to file or correct a return after the ordinary deadlines have passed, within a statutory window measured from the end of the relevant year, on payment of the tax due together with an additional amount for the delay. The mechanics are unglamorous: identify which years are still inside the window, compute the tax on the omitted interest, add the additional amount the statute attaches to a late correction, and file. Start with the earliest year still available, because that is the one about to close.
Can I use an updated return to claim a refund I missed?
No. The route runs one way. It exists so that a taxpayer can bring income to tax that was not declared, and it cannot be used to reduce a liability already determined, to create or increase a refund, or to report a loss. People often arrive at it hoping to recover tax withheld at source on Indian income, and are surprised by the limit. Where withheld tax exceeds the liability, the remedy lies elsewhere: in the ordinary return if a filing period is still open, and in the relief or appeal machinery if it is not. Establish which applies before filing anything.
I am an NRI who never filed in India, can I file now?
Yes, if the year is still within the window the statute allows, and filing is usually better than waiting. Several things should be settled first. Whether you were a non-resident for the years in question, because that decides what India taxes at all. Whether tax was already withheld on the Indian income, since that changes the amount payable rather than the obligation to file. And whether the same income has been reported in your country of residence, because the two filings need to tell the same story. Then work through the earliest available year first.
Does filing an updated return in India change my Canadian return?
It can, in two ways. If the Indian income was never reported here either, the Canadian years need correcting on their own terms, and that is a separate process with its own rules. If it was reported here, the newly paid Indian tax may change the foreign tax credit claimed for the corresponding year, because the credit is measured against the Indian tax finally determined rather than the amount originally withheld. Sequence the work: settle the Indian liability, then adjust the Canadian year to match it. Doing both at once tends to produce two versions of the same income.
How much extra tax do I pay on an updated return?
More than the tax itself, and more the longer you leave it. The statute adds a percentage of the tax and interest due on top, and that percentage steps up according to how far into the window you file, so the cost of deciding slowly is measurable. The figures move with the finance legislation, so have the computation done for your particular year rather than relying on a number someone quoted you. Interest on the underlying tax runs as well. The comparison worth making is that total cost against what an assessment reaching the same income would produce.
Will filing an updated return stop a notice being issued?
It is not immunity and should not be sold as such. Filing does not remove the authority's power to examine the year, and where proceedings are already on foot for a year, the route may not be open for that year at all. What it does is change the posture of the file. The income is declared, the tax is paid, and the record shows a taxpayer who corrected the position before being asked, which is the difference between a correction and a discovery. Check the status of each year before filing, one year at a time.
What is double taxation?
Double taxation means the same income being taxed by two authorities. It comes in two forms: juridical, where two countries each tax one person on one amount, and economic, where two different people are taxed on the same underlying profit — a company on its earnings and a shareholder on the dividend paid out of them. Relief comes from a treaty, a foreign tax credit, or an exemption, and which one applies depends on the income type. How to avoid double taxation sets out the routes.
Is double taxation legal?
Yes. Nothing prevents two countries from taxing the same income under their own domestic law — each is exercising its own jurisdiction. What treaties and credit systems do is relieve the outcome rather than prohibit the charge, and relief is generally something you must claim on a return or a form, not something applied automatically. Miss the claim and the double charge stands. Double taxation explains the mechanism.