It works OK!
I moved to my new server…
I have two dolibarr installation
one for test purposes(2.7) an the other with real data (2.6)
I installed as you said and got it working.
Thank you very much Eldy!
after intalling and using this new module, I realize that in fact what determines the type (letter tag) of invoice could be “tva_assuj” value 1 or 0 from llx_societe table. (this would be enough) but as you have solved… it also works and can be used more generically
I will examine your module and see if I can understand, and I could make another one for linking this tva_assuj with invoice mask.
mercy beaucoup! (?)
Ale