HMRC Admin 8

Hi,
Both Italy and France accept either a certificate of residence letter issued for their specific country or local forms.  
While the majority of countries accept the standard certificate of residence the necessity of particular forms, or the format of a certificate will, as you have stated, depend on the country.
Thankyou.

Hi,
Companies are incorporated in the UK through Companies House (which is a separate office to HMRC) and you should contact them in the first instance regarding forming a company while not resident in the UK.
Information when setting up a limited company which you may find useful, particularly under "register as an overseas company" which advises that you do not need to register if you do not have a base in the UK.
A company registered for corporation tax is required to submit company tax returns, statutory accounts and computations anually.  
There may also be requirements to register for other taxes such as VAT.  
It is not really possible to list all necessary requirements in a hypothetical situation and I would recommend taking independent financial advice regarding your obligations.
You will need to establish, for example, whether you will have economic activity in the UK.  
There is a difference between a non-resident company that is trading from abroad with customers in the UK, and one that is actually trading in the UK.   
Thankyou.

Hi,
This should be recorded in the accounts, not the tax return, so would not be recorded in any box.
Thankyou.

Hi,
If the company is dissolved at Companies House it no longer exists and a company tax return is not required.
Dissolutions are usually automatically notified to HMRC by Companies House.  
If the notice to deliver a return was issued after the date of dissolution please contact Corporation Tax Services to ensure the dissolution date has been noted on our records.  
Thankyou.