Should I ignore a PTS-1099 with 405K in box 2 and $842.54 in box 6 if house was lived in for 15 years or should I account for it somewhere? If I should, where?

Fiance lived in house 15 years.  Sold if for 405K.  Net proceeds were 50K.  She was issued a PTS-1099 showing $842.54 in Box 6, "Buyer's part of real estate tax."  I don't know what to do with this.  I have read that if you lived in the house for a certain period, any profit is tax-free.  Any help would be appreciated.