Problem
The pricebook task is missing when adding a task to an invoice. This happens because of its setup in the pricebook.
Solution
Make the pricebook task show up for invoices.
Add the pricebook task to an invoice
In ServiceTitan, go to the navigation bar and click Pricebook.
Search for the pricebook task within services.
Click More
and select the View/Edit Service option.Click the Workflow tab.
Select the Do nothing option.
Click Save.
After these steps, the pricebook task will be available to add to your invoice.