If I were to carry an electric guitar in my car back, will I be subject to sales tax?

According to custom's website, there was no mention (of sales tax or duties) under header 9202 or 9207

http://tariff.customs.gov.my/

I'd need to transport the guitar back in its shipping packaging because there is a notice that it cannot be open unless stored in room condition for 24h.
And also is there a limit to how many guitars I can bring back at a time in such a packaging?

The items are for personal use only and definitely not for resale.