How do I get back to business start-up if I have not finished it?

Hello there, @Monihaha20. 

I want to ensure I'm providing you with the right answer to your questions. May I know what have you started on your QuickBooks company?

Just in case, here are our article that will serve as your reference in getting started and adjusting the settings after signing up for QuickBooks Online. 

I look forward to having you again with more details of your concern. Take care!