T1 general extension

I intend to apply for an extension soon. My concern is which docs to put in the application. As I don't want to put unnecessary docs

Am working for my ltd company from which I pay my self salary and dividend from the company accts.
I have;

Payslips
Dividend voucher
Accountant latter summarising my earnings
Business and personal bank accts
Company certificate

My concern is do I need to put
Company invoice and
Degree certificates?

Pls sum1 advise. Ta

post your query in Tier 1 section you will get your answer also you can search