Hello,
There is a bug in posting entries in Expense Tracker when you have a product with tax.
Error Message : Cannot create unbalanced journal entry.
If you used a product without tax, no problem. If you used a product with included tax, an entry is generated but this one is false. Bad repartition between base and tax.
I repreduce in demo database. I use odoo 9 9.0c-20170125 and French accounting module.
Thank for your help or a fix