How do i attain this workflow?

User ----> Quotation—> Saved (cannot be sent or printed if not yet approved) Submit button grayed out
Manager approved, submit button enabled. sent

if not modified > sales invoice
if modified > needs approval again.

Im open to a better suggestions.

please be gentle on code languages. im not a developer. thank you.

Bump bump. anyone please?

Let your manager have Submit rights only (?)

if the manager has the submit rights how about the commisions? because when manager submit it it will be on his name.

Commissions can be set via the targets table in the transaction. Did you check?