Hi Alexyes,
I visited the official Malaysian government site to try and get more information on importing to Malaysia, however the links lead to nowhere unfortunately.
I suggest visiting this link to learn more about how you can start a business in Malaysia, Link hidden: Login to view
For Duties and Taxes, you may refer to Link hidden: Login to view Please note that I was not able to review this as the content is in Malay.
You might find this helpful - A list of things you can import for free, those that are prohibited and restricted:
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Here are related posts on our forum with more information and Malaysian suppliers -
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Hope this helps :)