Those who file electronically have no problem, what’s more, HMRC is putting into place other ways for contractors to meet the deadline. Nil returns can continue to be made by telephone and HMRC are also prepared exceptionally, during continuing disruption, to accept paper returns at their Enquiry Centres.
There are likely, however, to be some contractors whose returns, will not be received by the 19th October, even though posted in what would normally be good time to meet the deadline. HMRC are prepared to consider these cases sympathetically.
Contractors can make nil returns and get further assistance by telephoning the CIS Helpline on 0845 366 7899.
Taken from the HMRC's website.