How difficult is it to integrate Shopify to Quickbooks Enterprise?

It can be quite challenging but if you use some experts it can be no big deal at all. I recommend to check out this reliable shopify quickbooks integration https://skyvia.com/data-integration/integrate-quickbooks-shopify and be aware of all peculiarities. I used to work with those experts and should say I was impressed by a high level of their competance. Hope it will make sense for you

I appreciate your reply and idea

Thanx

Sign in to your QBO company.
Go to the Hamburger icon, then select Apps on the left pane.
In the Find Apps page, type in the search box “Shopify”.
Choose the third-party app that fits your preference.
On the App page, click on the Get app now button.
Follow on-screen instructions and confirm.