You need to amend the sales invoice when you have either made any error or you have raised the invoice of a higher amount against a particular transaction

To amend a particular sales invoice you need to follow the given procedure:

• On the dashboard, search for “Sales Invoice List” and select it

• Page will open up with list of all sales invoices. 
• Open the invoice that you wish to amend Open the concerned invoice and click on "Revise" Option and make the necessary changes required. (as shown in figures)

• Once you click on revise, pop-up will appear to confirm if you wish to amend the invoice.
  Click on "Yes" to confirm and proceed

• After confirmation, your invoice would open up for making the revision.

You will be able to change the following data:

• Customer: You can change the customer name, if you raised an invoice for a different customer by mistake
• Posting Date: Date on which the invoice should hit the books of accounts
  
  Note:If you change the posting date, generated invoice series will not changed E.g. Your posting date is 28 mar, So series generated with 1903 (19 = year, 03 = march month).
  Now if you change posting date to 3 Apr then series will not change 1904

• Customer Address: If the invoice is supposed to be raised for a different address, you can change the address of the customer
• Currency: Currency in which the invoice is supposed to be raised
• Item: You can add more items to your invoice (if required) or if you have made error in your previous item you can delete and add the item again with the necessary changes

After revision of details, you can  "Save" and "Submit" to amend the invoice

You will now find the amended invoice with an amended invoice series 

Your invoice is  now amended.