If the address or ID number of your own company changes, you can edit the necessary information in CRM directly in the detail of your own company: click on Directory> Clients> Relationship filter> select Own company
If you want to upload a new logo that will appear when exporting a Quotation or Order, go to Settings.
This adjustment can only be done by the administrator via: Settings> Edit header and footer.
A short video with the procedure to watch here.