I run a subscription based business. I have multiple subscribers who make payments on different dates in a month and I raise a Bill of Issue/Invoice at month end. I have customised the customer tab to have all information I require for raising invoice/bill of supply.

Selecting one customer at a time is very time consuming and also if I have to use upload option for Invoice/Bill of Supply, I have to import customer data from zoho books, prepare the invoice/bill of supply in the format and upload into invoice/Bill of supply tab. Is there a way to link customer tab and Invoice/Bill of supply tab so that I can raise bulk invoice at month end?