Where do I declare the sale of our primary residence in France? And do I enter the Dec 31 2020 Dollar equivalents for our original 2005 purchase and sale prices?

Our French lawyer prepared a doc showing the difference between what we paid for the apartment, and what we sold it for, (minus fees) was a gain of 250 Euros.  I'm hoping I can use this to enter in values to calculate our capital gains (which we already paid french taxes on).  Hoping this amount is so low, that it is easy to report on, without worrying about exceptions.  thanks a lot!