This video is a few years old now but I believe it is still relevant.
If you are operating any online business which is based in the USA then you are liable to pay USA tax unless your country of residency has a Tax Treaty Agreement in which case you can use the W-8BEN form which will exempt you from paying USA Tax. You will however most likely be obliged to pay tax on your earnings in your own country.
Please take note of the disclaimer in my video.
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