Since LHDN implementing KPI in their ranks... they are getting strict with tax collection. I own a sdn bhd and learned it the hard way in my 1st 2 years

My suggestion is to bite the bullet and go sdn bhd. What u can do with your profit is to convert it into expense assets.

eg. buying a shop lot (through bank) will be consider expense asset. Cars can also can be use but you have to justify it uses for business/goods transit.

More than that like mtsen said above... get a good Co Sec/Accountant... some can give you valuable advises on how to do tax deductions.

I'm not well versed in tax but hopefully my small experience owning a sdn bhd helped.