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 .
I am really confused in using the word âdo and doesâ with I and youâ, and I and you refer to single person, and according to present indefinite tense, we should use âDoesâ with âI and Youâ(as are single persons), instead of âDoâ