YOu need to make the difference between the periodic expense recognition into your books AND the fact that you paid in advance for 12 months.
At he time you paid:, the entries are:
Debit the OWNER'S ACCOUND FOR THE TOTAL PAYMENT
CREDIT BANK ACCOUNT
Then, your monthly recording of the expense (which you can do using the recurring process from Odoo,) will be:
Credit the owners'account (balance sheet account; like a supplier)
Debit the profit and loss account (P/L) which might be named "office rental"
This is excatly what you need to set up in Odoo for the recurring entry
At the end of the year the owner's account should show a NIL balance and you office rental account will show a total expense for the 12 months.