Your company logo can be uploaded in two different places in your FastBill account
1. Logo in document template
A logo can be uploaded to each document template and dragged to the template with the field Logo
2. Logo in master data (Plus subscriptions)
If you have a Pro subscription you can upload your logo to your master data, which will be used for your e-mails and the online view of invoices for customers, but only when the function online-invoices is activated.