Python Flask-based Invoice, Billing Generation web service with REST API PostgresSQL DB

Invoice and Receipt PDF Generation web service for Indian businesses Technology to be used Flask, PostgresSQL database, Simple minimal Web UI. Webpage to Flask interaction using REST API (JSON) Features - User registration and login required. - Users can add their business name, address, logo, contact (email, phone), GSTIN, PAN - Client address book with contact details, client GSTIN - List of services may be configured - Goods/Service description, HSN/SAC code, quantity (number), unit (meter, kg etc.), total value. (THE HSN/SAC code needs to be retrieved from the official website/reliable web api service), Rate and amount of taxes - While generating invoices, it should be easy to pick suppliers and goods/services from the already configured list. Also allow editing of the goods/services, Rate. Tax to be calculated i.e. CGST/ SGST/ IGST Total amount to be calculated Able to generate PDF invoices and receipts Invoice and receipt to have the following Logo of the business Invoice number and date Business contact information with GSTIN Client’s contact details with GSTIN Shipping and billing address Goods/Service description, HSN/SAC code, quantity (number), unit (meter, kg etc.), total value. (THE HSN/SAC code needs to be retrieved from the official website.) Total invoice amount Invoice to have Terms of Payment including the due date for payment. mode of payment and PAN of the business/user. Note 1: a sample invoice is attached for reference. Note 2: HSN Lookup [login to view URL] Development will be done on a Gitlab project repository assigned after shortlisting