go to odoo apps.search general ledger by "pycus".

In development mode try to copy journal items from 'Adviser' sub-menu.
Or if you have got an access to your database try this request

select aml.move_id,aml.date,debit,credit,rcur1.name as functional_currency,aa.code,rp.name as partner,aml.name as details,aml.amount_currency,rcur.name as foreign_currency,rcom.name as company,ai."number" as invoice_numfrom account_move_line as amlleft join account_account as aa on (aml.account_id=aa.id)left join res_partner as rp on (aml.partner_id=rp.id)left join res_currency as rcur on aml.currency_id=rcur.idleft join res_currency as rcur1 on aml.company_currency_id=rcur1.idleft join res_company as rcom on aml.company_id=rcom.idleft join account_invoice as ai on aml.invoice_id=ai.idwhere aml.date between '2016-01-01' and '2016-12-31' and aml.company_id=1 and aa.company_id=1 and rp.company_id=1 and ai.company_id=1order by aml.move_id,aml.date

I have the same problem (exporting the journal of my POS) and found no easy solution so far, but my tax auditor demands an easy-to-process Excel version... any ideas anyone?