Do I have to file at home while living in United States?
Residence decides it, and residence is a question of facts rather than of where your post arrives. The one exception is US citizenship, which carries the filing obligation with the person wherever they go. So the first thing we establish is which system still claims you.
Is there a treaty between my country and United States?
Treaty networks change with each protocol and each multilateral-instrument position, so we confirm the treaty in force for your specific year with the issuing authority rather than relying on a published summary. Where there is none, unilateral relief and domestic law do the work instead.
I own property in United States. Where is the rent taxed?
In United States, because that is where the property sits. The complication is the base: gross-rent withholding takes no account of mortgage interest, tax or repairs, so a leveraged property can face tax on turnover. An election onto net profit, where it exists, is what fixes that — and it has its own timing.
Does giving up US residency require more than just moving away, given the worldwide-income rule?
For a US citizen, moving away does not end the US filing obligation at all, since citizenship alone maintains it regardless of residence — re-establishing residency elsewhere is a separate question from the US filing obligation, which continues unless citizenship itself is formally relinquished.
What happens to US state tax obligations when someone moves back from the US to another country?
The specific state's own residency rules determine when state tax obligations end, and these do not necessarily align with when federal filing obligations change, so a departure from a state needs its own review distinct from the federal position, particularly for a US citizen whose federal obligation continues regardless.
Does an Indian founder need to unwind their US entity when moving back from the United States personally?
Not necessarily — the founder's personal residency and the entity's own ongoing existence and tax position are separate questions, and a founder can move back home while the US entity continues operating, provided its own compliance is properly maintained independent of the founder's personal move.
How long do I have to be out of the country to stop being resident?
There is no single period that settles it. Canada looks at whether your ties were actually severed, not at a day count; the United States taxes citizens regardless of where they live; India applies day-count thresholds with a second limb reaching back over earlier years. Time abroad is evidence, not a rule — what decides it is where your home, family and economic life sit. See tax residency.
How does the treaty tie-breaker work when both countries say I am resident?
As a sequence, stopping at the first test that gives an answer: where you have a permanent home available; if in both or neither, where your centre of vital interests is; then habitual abode; then nationality; and if all of those tie, the two tax authorities decide by agreement. It is evidential rather than elective — you do not choose your treaty residence, you demonstrate it, which makes the record of homes, family and time the substance of the claim. See tie-breaking dual residency.