I sold my house in 2021. Do I enter the date I bought the home or do I enter the date that my buyer bought/acquired the home ? (This is for a house that I sold).

[DavidD66]

The date you enter is the date you bought the house which is the date that you closed on the property.  

[pamelamabasa]

I bought the house in 2011. Just to confirm, I enter the date I bought it in 2011 and not the date that my buyer bought it from me in 2021? 
this is the income section/ selling a house. Thanks. 

[DavidD66]

For the sale of a house, you have to report two dates: your purchase/acquisition date, which is the date you bought the house; and the sales/disposition date which is the date you sold the house to someone else.