C20240331

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