In AX 2012, we nee to define structure. It’s a relation where we define which all dimension will be active for a ledger account. After the COA configuration is created and activated, it is attached to COA form. Dimension will be activated in all the financial transactions automatically.
Go to GL> setup> financial dimension> financial dimensions here we create financial dimensions. To see the table you right click on this form and click personlise and and form opens where u can get the information of table.