General information
You'll find your NIF on the upper left corner of the document provided to you by Finanças via AnchorLess. It will be by the left of your name.
You NIF number is permanent! This is not a temporary number.
Be aware that, if you are not an EU/EEA resident or did not provide a Portuguese address, the information on the lower part of the PDF it's from your fiscal representative (legally required by Portuguese Government - with AnchorLess a hired lawyer) and won't be necessary for your day-to-day life.
Visual guide
Below is a guide to find your information:
If there are fields that are not filled in on your NIF document, don't worry, it's perfectly normal - that's how the Portuguese authorities fill in NIFs.
This will not affect any of your procedures.