Hi
I have read your requirement well about modification needed in sales module in odoo v12 community.
i have 2 years of experience in odoo and worked with odoo V 10, 11,12 ,13 both community and enterprise.
have developed and modified may modules like sales, accounting, payroll, timesheet, payslip, contacts.
I think i can easily undertake your task and deliver it on time.
So, kindly message me so we can start immediately.
Thank You
Aayush