[Koha] MARC tags for following data

Hi all, We extracted bibliographic data into excel file from Libsys software. I could managed MARC tags for almost all the fields except following fields. Is it possible to add MARC tags for the following fields? If yes, which are the tags to be incorporated? If no, how would I migrate following details into koha? BUDGET ORDER_TYPE ORDER ORDER DATE AMOUNT (USD) AMOUNT_RS DISCOUNT AMOUNT_PAID EXCHANGE RATE INVOICE INVOICE_DATE ACCN_DATE Thank you very much in advance -- ***With Regards*** Shivakumara RM Digital Library Analyst Institute for Social and Economic Change Dr. VKRV Rao Road, Nagarabhavi, Bangalore - 560 072 <https://sites.google.com/site/shivakumararm/>