When do I apply the £1000 personal savings allowance to declaring interest on my SA Tax Return?

If the gross interest on my savings is £9,000 in the relevant tax year, do I delare in my SA Tax Return: (a) £9,000 and HMRC will deduct the £1,000 PSA and calculate tax on the balance of £8,000; or (b) £8,000 (having "deducted" the £1k PSA myself first)? I have written twice to HMRC about this and never got a response by post, and can never get through to the HMRC phone line. Many thanks for your guidance.

Hi,
You would declare the gross interest figure £9000.
On your calculation you will receive the personal savings allowance. 
Thankyou.