live in a house for 2 years, and pay no tax question

[John H.]

In MA, if I live in a house 2 of the past 5 years, I can sell it tax free.

I owned a house for 2 years 1 month.

Does the IRS check up on where you lived for that 2 years?

I actually lived there 2 years, but through post office address changes I did not. I was late changing my address by months and I changed my address early by months so my new drivers license would be of that of my new house.

I made less than $20k profit so its not even a huge tax break, but I hate paying extra in taxes out of fear.

Any thoughts?