setting for excise rate in J1IG

Hi,

We have depot plant, in po we are selecting only the vat condition, after making GR with MB01 we create the rg23d entry with J1IG in J1IG the

BED %: 10%

ECS% : 2%

TAX1% 1%

The above 10,2,1 % comes in the mention column i want to know from which setting those % comes automatically can we add the 4% in the same.

regards,

zafar