When trying to connect to my HSBC account it’s saying “your username is invalid”. I don’t understand as my username is correct.

Hello Hello-Willhazell, 

Welcome to the Community page, 

Can you try clearing your cache and cookies to all time close the browser down, reload it and try again. Let us know if you still have a problem. 

I tried on my Mac and also on my iPhone with no luck?

Thanks for trying that so having had a look more into it that message will be coming from the banking side and not ours so you would need to get in touch with the bank and ask them why they sending that message and double check it is the right information. 

It's the same username as I log into my bank with online and on my banking app, so I'm not sure why it wouldn't work.

Hi hello-willhazell, can we check which account type you're looking to connect (such as current account, savings, etc) and whether this is a personal or business account?