Lynn911 Dallas Realtor & Consultant, Loan Officer, Credit Repair Advisor
The Michael Group - Dallas Business Journal Top Ranked Realtors
Now, if the duplex house was sold individually per side, and you and the other buyer are not together, then yes. But let me be clear, that is only if the duplex was divided and each side was sold individually as two different properties.
Be sure and advise with your tax advisor on the qualifications that were current when you made the purchase (they did change).
No you can;t both apply for the full tax refund, but you can do 50% each. If there are two units and each is owned separately in title and separate property ID's then you should take it up with your tax accountant.
All the best.