India Localization scenario

Dear All,

We have scenario,

We are in trading organizations, Supplier importing goods and passing us Duties (CVD and SCVD) and we will be passing these duties to our customer, but duties will be reflected based on supplier Accessible value but we will knowing supplier accessible value only during Supplier invoice (so option of using Accessible price list of supplier is rolled out) so we need to maintain custom duties as adhoc and update during PO receipts. Also customer likes to see BOE number reflected in AR invoice copy. Can you please share your thoughts to handle this scenario..

Many thanks.