Hi there jen-trentrefinis,
It's vital that your company be able to manage its sales effectively so that you can provide as many services as possible to your customers. QuickBooks Online is a great tool able to connect to various other services like CRM software through apps made by other developers. I can point you in the right direction for information regarding apps that connect to QuickBooks Online.
In order to see which CRM software has the ability to connect with QuickBooks Online, you can navigate to the Apps tab, then search for any apps that might interest you using the search bar or browse by categories. In order to see more information on an app, click on it, and you'll see some descriptions of the features from the developers as well as the pricing. You can also read customer reviews in this section in order to help you make the decision that's best for your business.
If you have any other questions, feel free to reach out here.