To cover the change of consumption tax to 10%, we recently opened a pull request to add the definitions to Odoo itself. As of 25 November 2019 it has not been merged yet, but we are pressing Odoo S.A. to merge it soon and have it carried through to the latest version.
What it covers is:
- adding the definition of 10% consumption tax and the settings it presupposes
- adding a fiscal position definition for the reduced tax rate
- other small adjustments and fixes around tax
That is roughly the extent of it.
If you are used to reading Odoo's code, please see the pull request for the details.
Existing customers have already had the equivalent adjustments applied individually, but carrying on adjusting each one by hand — customers still in implementation included — is inefficient, so I sat up and did the work after the children were in bed.
The reduced tax rate had me wondering how best to handle it, and for now it simply adds a fiscal position that converts 10% to 8%. (It might be worth preparing an 8% to 10% pattern as well in some cases, but I could not think of a good name for it.)
There are several other things in the chart of accounts I would like to fix, and I intend to follow up on those when time allows.
If anything strikes you, do send a comment to the Odoo community or to my Twitter account.
We have opened a pull request for 10% consumption tax and the reduced rate