First, a quick look at this server.
Create an empty database and a user for it first. The installer never overwrites existing data.
Optional, but it saves a failed install.
You can change all of this later in Settings.
As registered, for invoices.
13-digit Business Identification Number, if registered.
Other currencies can be enabled afterwards.
Bangladesh: July (1 July – 30 June).
The owner always holds every permission. Use your own name and a strong password; there is no default account.
At least 12 characters.
Check the details, then install. It usually takes under a minute.
When it finishes, the installer writes its marker and switches itself off. Make config/ read-only afterwards.