Yes. You can claim your fiancée, but only
if you paid for over half of their care and they are considered a
dependent. To see if they qualify as a dependent and if you can claim
them on your taxes, please use the IRS interactive tool Who Can I Claim
As A Dependent. To see more
information on who you can claim as a dependent please read this Turbo Tax
article; Who
Can I Claim As A Dependent. If he is your dependent, you will use the Head of
Household filing status. In order to qualify for head of household a few
of the requirements is that you are unmarried and have at least one dependent
(in this case, if he qualifies, your fiancée). To learn more about this
filing status, please see the Turbo Tax article below.
https://ttlc.intuit.com/replies/3288637