Per FBR, 3520, 8938, the exchange rate is used by the end of the year (Dec 31th). I inherited the house, mother passed away on 4/27. Actual acquisition date (legal) is 9/8. I use the exchange rate of Dec 31 for FBAR, 3520, 8938. For the long term capital gain, I use the exchange rate of 9/8 for the Basis. I use the appraisal value on 9/2.
