Do I need a residency certificate to claim DTAA benefits in India?
In practice yes. A claim under a DTAA is not established by pointing at the agreement. India expects a residency certificate from the tax authority of the country you say you are resident in, together with India's own declaration of the particulars supporting the claim. Without them a deductor is likely to apply domestic rates, and an assessing officer has little to examine. Obtain the certificate for the relevant Indian tax year rather than a general one, and get it before the income arises where you can, because it is the document that turns an entitlement into something a payer or an officer can act on.
Is a DTAA the same thing as a tax treaty?
Yes. Double taxation avoidance agreement is the term India uses for what other countries call a tax treaty, convention or agreement. The name is a difference of drafting habit, not of substance: the instrument does the same work, allocating taxing rights, capping deduction at source and providing relief where both countries tax the same income. What is distinctive about the Indian setting is the procedural layer around the claim, the certificate and declaration India expects, and a separate exchange-control regime that governs whether money can actually leave. A position can be correct for tax and still be held up on the second.
Indian tax was deducted at the full rate, can I still get relief?
Usually, but by a slower route. Where the deductor held no certificate or declaration at the time of payment, it will have deducted at domestic rates, and the treaty rate then has to be claimed by filing in India for that year and seeking the excess back. That means the income, the deduction and the entitlement all have to be evidenced after the event. The alternative, where payments are continuing, is to get the documentation to the deductor so that the correct rate is applied going forward. Fixing the mechanism is generally worth more than recovering one year's excess.
Can I claim DTAA relief without filing an Indian tax return?
Sometimes the correct rate is applied at source and nothing further is needed. But if tax was deducted at more than the agreement allows, the excess is recovered by filing, because that is the mechanism through which India determines and repays it. Deciding whether to file therefore depends on what was actually deducted rather than on what should have been. Check what the deductor reported as well as what it paid you: a deduction credited against your name in India is money you may be entitled to, and it is not repaid on request without a return behind it.
Do I claim relief in India or in the country where I live?
Both countries have a role and the order matters. The DTAA decides which country may tax the income and, for many kinds of payment, how much India may take at source. That part is dealt with in India, through the certificate and declaration or by filing there. Relief for what India properly took is then given by your residence country against its own tax on the same income. So you are not choosing between the two. You settle the Indian position first, then carry the evidence of Indian tax borne into the residence return.
My Indian bank deducted tax on my deposit interest, can a DTAA reduce it?
Possibly, because many agreements cap what India may take at source on interest, but a bank can only apply a cap it has evidence for. Banks act on the documentation on file, so a certificate that has expired, or a missing declaration, produces deduction at domestic rates whatever the agreement says. The practical steps are to check what the bank holds and for which year, refresh it, and then decide whether the excess already deducted is worth recovering by filing. Check how the account itself is classified too, because the deduction treatment follows the account type as well as your residence.
What happens if the two countries disagree about which of them can tax me?
The treaty has a procedure for exactly that. You apply to the competent authority in your residence country, which takes the case up with its counterpart, and the two negotiate a position that removes the double taxation. Some treaties add binding arbitration if they cannot agree. It is slow and it runs on documents, so the practical work is preserving the record and filing protective claims while the clock runs. See our treaty work.
What is double taxation in a corporation?
That is the economic form: the company pays tax on its profit, then the shareholder pays tax again on the dividend distributed out of that same after-tax profit. Domestic systems soften it with dividend credits or reduced rates on distributions; across borders it is compounded by withholding tax in the paying country. Which relief applies turns on the entity type and the treaty article covering dividends. See repatriating profits.