aiyo first you are sole prop so its personal.
so i ask you your father draw his salary from where ?
what he write in the cheque when he draw salary ?
so when he naik gaji how? work 30 years when he decide naik gaji ??

then when naik gaji how he tell LDHN ? as sole prop ?
so draw lah some gaji yearly xxx amount put in epf.
all the question marks are you answer.

so how he come to conclusion his salary is rm3000 ?
can he draw RM90000 salary ?

why 3000 can and 90000 cannot ? who decide can or cannot ?

just pay your pcb tax la for this 1 time 90000 as salary.
next month back to rm3000 la.