Click on the person icon in the top right of the screen. Select My Organisation.
Please note to create an organisation you need to have a valid payment method added.
Click on Upgrade.
Input your organisation name, upload your company logo and click on upgrade.
Please note when creating your organisation the name you use is replicated on the invoice and the billing report.
If you need to edit your organisation go My organisation and in the settings tab click on the 3 vertical dots next to your organisation.
From here you can change your organisation name and default logo.