How to modify Passive loss Carryover from previous years?

I lost my tax file for 2018, so i had to manually input all the rental properties information for my 2019 return last year. I found I forgot to input the passive loss carryover from the previous years for the 2019 return. How can I make this up this year and correct the entry? Can I just simply put the total numbers in 2019 carryover?