Get your taxes done using TurboTax

"Disallowed" means that you could not deduct it in the current year. The partnership may have invested in rental property, that may be why the losses are passive. Also, if you didn't materially participate in the partnership, losses from ordinary business activities would be considered passive.

When you enter your K-1 from the partnership this year, you will see an option to enter the passive losses from the previous year, just click on that option and answer the questions.