logistic inv. verification exess amount

Dear all,

While doing logistic invoice verification i have received an invoice for RS120 but the PO value is 100. for this i have configured tolerance key BD Small Differences value up to 100.

When i check for messages it is saying that "tax code entered is not defined in company code'.

If i do the Invoice verification with the amount same as PO amount it is running fine.

is there any settings to be done to accept the invoice if the amount is excess of RS 100.

Plz Help

Regards,

Tilak Koganti