Filing deadline today but haven't received Corporation Tax activation code & no helpline

Hi - I am attempting to file my Corporation Tax online but can't because I haven't yet received an access code and had not checked whether one had arrived in the post from HMRC until today - despite me requesting one many months ago. I admit I should've checked earlier, but am now in a situation where I am going to miss the deadline & payment because I can't get into the account in the first place. Can I request an extension until my code arrives + a couple of workings days/a weekend for me to file it? Thanks

Hi,

You will need to contact our Corporation Tax team to request a filing extension.

Corporation Tax: general enquiries

With regard to the online access you will need to contact our online support team.

Technical support with HMRC online services

Thank you.