Hello,

According to the CRA here:

https://www.canada.ca/en/revenue-agency/services/tax/individuals/topics/about-your-tax-return/tax-re...

You can calculate the ACB of your property by taking the price in which you bought it at in 2019 along with any closing costs, lawyer fees, etc.  as well as any fees incurred while selling the property.  You can also include any incremental costs (renovations, etc.) done on the property as long as you have kept the receipts.  Hope this helps!