I want to modify the 'TOTAL' field under Sales Quotation on right side below corner and also want to add the amount total calculated from Quotation template plus another value from functional field that I placed on Sales Quotation inside that 'TOTAL'
It should be like that,
TOTAL = Value from Quotation Template + Value form Functioanl Field + Taxes on Product
Your question is not much clear. Functional Field? any example case for your question? Do you want to add it on Quotation Print?