Immigration Law Questions? Ask an Immigration Lawyer.
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If you have paid all of the fees to them for your duty, you would be clear to reenter the country at any time in the future. The only time you would be denied is if you owed them or failed to pay or violated their law. Paying the fee upon leaving cleared any issues you have with them.
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Yes, this means you can reenter, even though they took less. The fact they stamped your passport means you would be cleared to reenter.
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