Their officer is doing some sort of investigations.

If they want to visit you or such, they will send a letter with the title "Lawatan Meja Audit" or something similar.

And in the letter will have specific request for what documents you need to prepare.

decide by ownself. Do you be able to justify when IRB audit?

What industry you are in? if it is retail selling then this will not be able to justify.

general rule = 2/3. you still put 100% of it but have to add back 1/3 in tax comp...if you want to claim more than 2/3, you need to prepare all the documentations bla bla bla to argue with them.

while waiting for value added responses form real sifus on tax matters,
i google and found this, hopefully this can help to provide some info

"Consider claiming “home office” expenses, for example, electricity, telephone bills, quit rent and service charges of apartments. If the business owner pays rent for the working area, it can be deducted from the business income. This applies to rent that is paid to a spouse who owns the home but is not involved in the business."

https://www.thestar.com.my/opinion/letters/...nd-partnerships

just hope it is applicable to your situation

tricky question,..
if you did not have an agreement, how to justify the actual amount to to claim for your "business use"?
if you have a rental agreement,...the "owner" must report that income to LHDN??....
 
anyway, how did it go?...i meant the koreh by LHDN? hope it is not serious...

Any excess tax paid will be refunded auto.

If your submission is long overdue, lhdn may be 'suspicious' and need more time and if necessary may even audit your old filings.