Tax on interest income?

I have a question for those of you who have obtained residency in Ecuador. Do you have to pay taxes on the interest income you made from those CDs? I am not talking about the 2% withholding if your CD is less than a year. I heard you pay taxes on income above $11,000? That includes wage, salary, commission, but does it include interest income? Do you have to file a tax return just like in US and Canada? Thanks in advance.

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