If you think you have received the form in error, you should inform HM Revenue & Customs (HMRC). Otherwise, the department will automatically raise late filing penalties.
To notify HMRC that you do not need to submit the P35, you’ll need your Employer PAYE reference (you’ll find this P35 they’ve sent you) and your contact details. You will also need to know whether you are intending to submit form P11D(b) as well.
You can notify them online at www.hmrc.gov.uk, over the phone with the Employer Helpline on 08457 143 143 or via an agent (such as an accountant).
Your local TaxAssist Accountant would be happy to deal with this on your behalf.