The Accounting settings section, allows you to edit your company accounting details.
You can navigate to it by clicking then 'Accounting Settings'
Updating some information, such as the year end can have consequences to the accounts so it is best to speak with your accountant first in order to establish whether this change is appropriate.
What can be updated?
Business Structure is the trading status of your business
Start Date is the formation date or the trading date, whichever is earlier
First Year End is the date of your businesses first year end after starting to trade.
Share Capital is the number of shares in the limited company
UTR Tax Number is the Unique Tax Reference for the business (if Limited Company), your personal one (if sole trader) or the partnership reference (if a partnership).
VAT Number is the VAT Number (if registered)
PAYE Ref is the PAYE Reference Number (if registered)
PAYE Office is the PAYE Accounts Office Reference Number (if registered)