When using the import data for bills, would it be also possible to upload the corresponding attachments specifying a path?

Hello Fransico, Welcome to the Community, When uploading import data for bills there is no way currently to import the attachment as well if you are using the import bills feature and importing in bulk. You can import the bills and then open the bill it creates and use the paperclip icon to add the attachment or bulk upload the attachments in the cog>attachments and then manually add the attachments as above to the bill.