how to manage entry tax in sap b1 9.0

Hi all

My clint production house in other state and billing house in other state so when ever he call the FG mmaterial from production house to corporate he need to pay entry tax @1% so I can transfer the material through inventory transfer with F form but how can I map this entry tax with FG item ??

second is how can Update business partner bank details in business partners- payment terms its showing inactive and I m not able to edit or modify it ?

Please help me

Thanks

Ricky