Additional Info needs to be stored for specific exp gl

Hi,

We have a requirement wherein for sepcfic expense gl such as Insurance & Travelling. We need to store additional information while doing invoice booking.

In case of insurance exp gl- fields required- Insurance base amount, Insurance Period, Nature of info ect.

In case of travel exp gl - fields required- purpose of travel, mode of travel, from to location, date/period of travel ect.

Pls suggest how we can add these field at FB60 & MIRO level. Where this information would be stored?

Best Rgds,

Sudhanshu Dang