Find your form. To search, type in a keyword and/or choose a category. To search for archived forms from a previous tax year, choose a year in the drop down menu.
So don't worry so much about how to use  had had  as a unit of grammar, they will come together naturally when you want to express the verb ' to have ' in the past perfect. Let's consider a different verb for a moment like  to want .
The noun was a variation on the English verb âto haveâ (Oxford English Dictionary online, 1989). The term was first used to indicate a personâs self-possession or refinement, but it was later expanded to include the conduct of non-human actors (Oxford English Dictionary online, 1989).