Why isn't the option to raise a credit note showing?

[Ben10]

I read from Managing credit notes that a credit note can be raised for both sales and purchase invoices but I don’t get the relevant option showing for me. Trying to enter a credit note for a purchase invoice and my screen looks like this:

What could be the reason that I don’t see the options? Am I reading the wrong instructions? Thanks for any tips or help!
A Quickfile newby

[QFMathew]

Hi @Ben10

You need to go into the purchase invoice itself. From there you’ll see an “Options” button at the top, with the option to create a credit note -