J1ID is a transaction code used for maintaining excise master data. It can be used to maintain Vendor Excise Details, Customer Excise Details, and Excise Registration IDs. You need to maintain the chapter ID for material in J_1IMTCHID as well. TAXINJ and TAXINN are both tax procedures used in India. TAXINJ requires additional excise rate maintenance while TAXINN finds all of the condition records created for the combination of vendor and material. In order to capture excise in MIGO or J1IEX, it is a mandatory condition that J1ID needs to be maintained which includes Chapter ID/Mtr Chapter ID etc.