Dear mridvika,
With regards to your query, we would like to update you that, as of now we don't have an option to import invoices in bulk. However, we have an option to import customers, suppliers, product and services, chart of accounts and Trial Balance.
If you need any assistance on importing invoices in bulk, we request you to use below link and raise a ticket. Our development team would be able to help you.
https://help.developer.intuit.com/s/
Hope this helps.
