You can contact the Technical Support of the app you're about to connect so someone can help you integrate it with QuickBooks Online.
Lastly, here's a few articles you can read to help manage your account and related transactions: Help Articles for QuickBooks Online.
If there's anything else that I can help you with, let me know in the comments. I'll be here to lend a hand.
We have to find yet any solution to coneect QBO directly to MS Flow. Consider to connect MS Flow to other MS products (e.g MS Teams, MS SQL) or other app (e.g Project Management, IT HelpDesk), then you may connect it to QBO.
You have clicked a link to a site outside of the QuickBooks or ProFile Communities. By clicking "Continue", you will leave the community and be taken to that site instead.