Wrong Square Footage

[James Weddington]

I live in California. I purchased a home for $285,000, 3 bd 2 bth 1920 sq ft. My new property is in escrow and closes on Oct 10, 2017. I used my 1031 towards the purchase. My bank has come up with a different square footage of the property than the seller/agent listed, short 500 sq ft. If I back out, I will loose $20,000 in taxes because of the time limit on my 1031. What advice would you give me?