In 2017 I disposed of shared rental property (50/50 with my spouse). I have recaptured CCA. In 2015 had class 1 additions, forgot to include them in my tax return. My spouse did in hers. In 2017 I overrode the UCC balance that was transferred from 2016. Do I need to request a modification of my 2015 and 2016 tax returns with CRA to reflect the proper UCC balance? No impact on my taxes, as I did not claim any CCA for both of those years. Thank you.