Which to use a main residence

So my late husband(passed in early Jan. 2019) and I had two homes in 2019 our main home which was sold in March of 2019 and a 2nd home which I moved into after the house sale. I paid property taxes on both homes in 2019.   For my Tax return in 2019 which home should I consider my main home.  I was thinking the home I moved into, but now I'm not so sure. 
could someone help with this question. 

Thanks,

LisaV