I know that you are looking for a quick and easy answer to your tax question, here in the Forum. But, be aware that nobody here (that I know of) is qualified to give tax advice or legal advice.
[B]The following is my opinion. I take no responsibilty for its accuracy, or for what you choose to do with it.[/B]
That being said, âŚ
Generally, the answer to your question is: No, as a foreign person who is not a resident and not a citizen of the U.S., your forex profits will not be taxed by the U.S. However, be aware that retail forex brokers vary in the way they handle the reporting of forex profits to customers, and to the IRS.
Your U.S. broker may, or may not, send you a form called [B]IRS Form 1099,[/B] reporting your forex profits for the previous tax year. If your broker does prepare this form for clients, he may, or may not, submit a copy to the IRS. (Apparently, IRS regulations do not require this reporting in the case of forex accounts; however, some brokers file Form 1099, anyway.)
If you have substantial profits in your U.S. forex account, and if those profits are reported to the IRS on Form 1099, you may be contacted by the IRS for an explanation of why you have not filed a U.S. tax return and paid U.S. tax on those profits. You may, then, be in the position of having to prove to the IRS that you are not a U.S. resident or citizen. Obviously, you want to avoid this nuisance.
[B]So, have a talk with the U.S. broker you have chosen.[/B] If you have not yet decided which U.S. broker to trade with, pick one that you think you might like, [B]and ask that broker all your forex taxation questions.[/B]
A better source for U.S. tax information would be a U.S. tax accountant, or tax lawyer. But, it will probably cost you a fee, just to talk to those professionals.
There is a lot of useless information about taxes on the internet. However, this particular webpage was written by a tax accountant, and you may find it to be useful â Forex Education - Taxes - Interbank FX
As for your tax liability in Malaysia, thatâs between you and the Malaysian tax authorities.