Laravel web-App Customization Required

Brief- This is a Accounting SaaS application with CRM features already built on Laravel. Requires following changes- 1. App frontend should run from root directory 2. Add client option in Modal at the time of invoice creation/estimates (while creating invoice/estimates, so as to continue the process flow ) 3. Shortcut for Create buttons at every page for - Invoices, Recurring Invoices, Estimates etc. 4. Changes in Billing and Shipping Address field for Customer Creation 5. GST/Taxation set-up (Presently setup of taxation is already present) 6. In line item for products and services- a. Products/services shall be added through Ajax search. b. Add/create products/services in line item (to maintain the process flow) 7. Shortcuts for every items shall be defined. (like “ALT+1”= Create invoice, ALT+2= Record payment, ALT+3= create estimates, ALT+4= Recurring invoices, etc) 8. Discount to be made line item. 9. Receipts (i.e. while recording payments from customers) a. INR shall be automatic in all cases b. While receiving, the invoice number shall be adjusted on FIFO basis automatically, but the option to choose/tick any other invoice number shall be there. c. The payment shall be receipt by mandatorily by any mode- like cash, bank hai to specific- bank 1, Bank 2, etc (option to add banks shall be there only) d. Receipt numbers shall be generated automatically but manually editable. e. Amount received in excess shall be separately shown, like an unsettled amount. 10. Import to create in bulk- Customers/Items, Invoices and Recurring invoice details, from xls or csv file., presently export option is there. 11. Hyperlink the Clients and Invoice number in a few views.- hyperlink to be set on client, item. 12. Insert option to be checked for Signature and seal. 13. Reports and their formats need to be created and revised. 14. Average Payment days of Receivables and payables. 15. Purchase module set-up. (presently sales module is fully setup). NDA will be signed before starting the project.