I an a co director but do not receive taxable pay or benefits do I have to quote a PAYE ref?

I'm a company director but do not receive taxable pay or benefits, I have no employees in the (very) small business and therefore no longer have a PAYE account - do i need to quote a PAYE ref (which as mentioned i no longer have) or some other indicator on my self assessment form as I'm still classed as a director and need to check the box accordingly....

Hi
If the PAYE account for the business has been closed, you do not declare this in the return as you didnt have  a 'live' employment in the year of the return.