Joined yesterday, paid my sub, can't get in, log in page shows '400 Bad Request'. Left it overnight, in case of a server problem, still no access today. Logged in successfully to Intuit.com with same credentials, went to 'Manage my account' and followed the link to my product (Self-Employed). Same result - 400 Bad Request
Tried logging in in an incognito window for cache conflicts - Same result
Am logged in on my phone, but this is not the experience I was promised! Perhaps you have no free trial because customers wouldn't proceed to paying for the service if this is the norm.
Can you please clear your cache and cookies to all time close the browser down, reload it and use this link to log into your account click on sign in> select the QB Self-Employed enter your log in details and it should log you into your account let us know how you get on.