We can perform some steps to get you sign-in to your Online account, Jack212.
What are the error messages you have encountered? To see if this is a browser issue or not, you can try logging to QuickBooks Online (QBO) using a private or Incognito window.
Here’s how:
For Chrome, press Ctrl+Shift+N
For Internet Explorer or Firefox, press Ctrl+Shift+P
For Safari, hold down Command+Shift+N
Then, try logging back into QBO.
If it works, clear your browser's cache to remove temporary Internet files and website files. You can also use a different supported browser.
If the same thing happens, I'd suggest contacting our Technical Support Team. They'll investigate what's causing this issue.
Here's how to reach them:
Click Help on the top menu.
Choose Contact us.
Enter your question in the What can we help you with? field.
Click Let's talk.
Choose a way to connect with us through Message an agent or Get a callback.
If you can sign in to your QBO mobile app, you can use it for the meantime.
Visit the Community if you need anything else in QBO.
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