There are two ways of creating Invoices in ApprovalMax
By pulling Invoices with the Awaiting Approval status from NetSuite
By creating Invoices directly in ApprovalMax (TBD in the next release)
If you have activated the first option and now want to stop pulling Invoices from NetSuite, you need to disable this feature in the Invoice workflow.
This is how it works
Open the Invoice workflow and remove the Requester in the Pulling From Oracle NetSuite section. Then click on UPDATE THE WORKFLOW:
If you don't want to use Sales Invoice approvals at all, then just deactivate the Invoice workflow: