I own my home as a joint tenant with a 50% stake. With that being said I'm assuming that I should only enter half of the beginning and ending mortgage balance for 2018? I noticed that if I enter half of the beginning balance and the entire ending balance it significantly decreases my federal refund. This would be a very easy mistake to make as there is no mention of listing a portion of the ending balance if you're a co-owner of a property. Any insight is appreciated. BTW - I'm using TurboTax Premier online version.
