VAT-exempt care: the statement to include
In France, practitioners legally entitled to the psychologist or psychotherapist title are listed among VAT-exempt care providers. The exemption covers care: the invoice then reads « Exonération de TVA, article 261-4-1° du CGI », not the small-business exemption statement. Anything that isn't care (training, corporate workshops, product sales) follows standard VAT or your small-business exemption.
Source : BOFiP, BOI-TVA-CHAMP-30-10-20-10 (art. 261, 4-1° du CGI)