You can enable Auto invoice generation once the auto invoice configuration is complete. Here the steps:
Step 1: Go to Admin Dashboard >> Income Tracker >> Member Income >> Bulk Posting>> Under section 'Post invoices in bulk' you will find a link to 'Generate Auto-Invoices'. Click on it.
Step 2: In case you want bills to be generated automatically, check the box " Enable Automatic Generation of Maintenance Bills".
If you do not want bills to be auto-generated by the system then uncheck the box.
Step 1: Go to Admin >> Income Tracker >> Bulk Posting.
Step 2: Under the section Post Invoices in Bulk, Click on the link 'Generate Auto-Invoices.
Step 3:Enter Date as per your requirement >> Click on Generate where Applicable. (Before click on you need to check your auto invoicing setting).