This app connects Shopify with Billit, directly in the Shopify admin, no need to use external websites. The app creates invoices that accurately reflect each order. It handles complex discount structures, tax rules, and let's you set customer-specific billing details directly in the Shopify admin.
Print packing slips, orders, invoices, refunds, draft orders...
"Automates GST invoices, credit/debit notes, and GSTR filings."...