All this data about you should be entered under Settings > My company. You will also find there an 'Other details' field where you can enter all the other information that you wish to display in your documents.
​

You can also put this information in the footer of your documents. To know how to add a footer to your documents, see this article: https://help.lsp.expert/en/articles/1863968-how-can-i-add-a-footer-in-the-documents-i-create-with-lsp-expert

You should enter this information in the Details field under Settings > Accounting.
​

You can also put this information in the footer of your documents. For that, you have to go in Settings > Document and email configuration > you select your configuration and you click on the Terms and footer tab.

For each document, you can define a footer:

When you're done, click on Save.