The Government Gateway credentials that you use to log in to your HMRC Online Services for Agents account.
The Unique Taxpayer Reference for your firm.
Postcode associated with your firm's Unique Taxpayer Reference.
Company registration number, if any.
VAT registration number, if any.
The name of your firm's money laundering supervisory body, your firm's membership number, and renewal date.
If you're applying on behalf of a sole trade or business partnership, your National Insurance number and date of birth.
If you're a registered Member of a Limited Liability Partnership, your National Insurance number and date of birth.