Hello there,
It's great to have you connect with us here. QuickBooks is a versatile program that allows you integrate your favourite apps such as Lightspeed. I'll be happy to share more information and help steer you in the right direction.
In order to integrate Lightspeed with QuickBooks, you'll need to accomplish this using an app such as this one here. You're more than welcome to search for other integrating apps on the website on the link I've provided here. Give this a try and let me know how you make out in the comments below.
I'll be one message away in case you need anything else. Otherwise, I wish you a great rest of the week.