No capital gains proof?

[Aaron Millis]

Hi BP,

So I’ve widely heard around here that if you live in a house for 2 of the last 5 years that you don’t have to pay taxes on your gains if you’re single up to $250K.

I’m contemplating selling a home that I lived in for 2 years. (2017-2019) Part of the time was just living there part of the time I was house hacking. Now the property is a normal rental and I don’t live there.

I’ve never sold a home so my question is how would I have to prove I lived there for 2 years to be exempt from taxes?