Updating Sales Quotations 
After you create a sales quotation, you can update it, as long as no higher level documents have been created with reference to that sales quotation. Some of the possible changes include:
Delete, add, and duplicate rows
Update prices and discounts
Update quantities
Procedure
Cancelling and Closing Sales Quotations
If you stop the sales process before you copy the sales quotation (fully or partially) to a higher level sales document, such as a delivery or A/R Invoice, you can cancel it:
Choose
Sales – A/R
Sales Quotation 
and find the
sales quotation you want to cancel.In the menu bar, choose
Data
Cancel .The status Cancelled appears in the header of the sales quotation and in the Journal Remark field on the Accounting tab.
Closing Sales Quotations
If you have partially copied a sales quotation to a higher level sales document, you can only close it.
Choose
Sales – A/R
Sales Quotation and find the
sales quotation you want to close.In the menu bar, choose
Data
Close .The status Closed appears in the header of the sales quotation.
Result
In both cases the sales quotation is not deleted. You can still display and duplicate it, but you cannot change it or copy it to a higher level sales document.
The system does not display cancelled or closed sales quotations in the Open Items List report.