In my country (Australia) ALL gambling winnings and profits are 100% tax free.

You don't have to declare it because it is considered a hobby.

In the USA and other countries gambling winnings are treated the same as income and gambling companies are required by law to withhold federal income taxes.

If I had to pay taxes I would quit gambling. The risk wouldn't be worth it.

Does your country tax gambling winnings and if so do you declare it yourself or does the gambling operator withhold the taxes on your behalf?