The Accounting Category is populated based on the last set of accounts that were filed with Companies House.

Categories can be:

• Total Exemption Full
• Unaudited Abridged
• Micro (entity accounts)
• Dormant
• No accounts yet filed

You cannot edit this field. The values are returned by Companies House and refreshed each night and will reflect the last accounts filed or, if no accounts have been filed, then simply show No accounts yet filed. 

If you wish to make your trading company dormant then please see here