none of my drop downs are working at all

Same here. It was working this morning (10-11am UK time), but isn't working now

Hello all, thanks for reaching out to the QuickBooks Community today

We're aware that some of our UK customers are currently unable to use the drop-down options in QuickBooks and our team are actively working on resolving the issue.

We'll update this thread once a fix has been confirmed and apologise for any inconvenience being caused in the meantime. 

Thank you all for your patience.  This issue is now resolved, please reply to this post if you continue to see anything different.