I have just managed to sign into my bosses sodding account on nannytax! I emailed straight away to tell him but he is really going to wind me up about it next week 
I went to log on with my ID and password and realised that it was different and asking me for my payroll number. I got my payroll number out and put in my password. Didn't work. Went to reset my password with my postcode, didn't work. Tried my old postcode, didn't work. Got annoyed at it, and then remembered that Ofsted go by your employers post code so maybe nannytax do too? Tried it, it changed the password to the account and told me what it was, then allowed me to log in. "Eureka!" I think, before I realise that it's addressing me as "Mr Pixie-Employer" 
What a twat I am! I then logged out and realised that the button for nannies is right underneath and is calling for my username and password which are exactly as they were the last time I logged in six months ago 
So take that as a warning nannytax users, pay attention to what you are doing!