i don't believe there is a requirement regarding the tax credit, but double check with your accountant.
Until the property is sold, it will affect your ability to buy another house as you will be hit with BOTH mortgage payments (current home and future home) in order to qualify. However, if your husband has sufficient income to sustain both mortgages (and other liabilities), then it may not be a problem. I can figure that one out for you. ;)
Hope this helps
Rene Joseph De Blanco
As for the tax credit, the best person to consult is your accountant, it's tax time, you probably will do that any day now anyway.
The tax credit required you to live in the home as your primary residence for 3 years after closing. However there are circumstances which may not force you to repay the tax credit should you not stay the mandated 3 years. You would need to talk to a tax professional who is familiar with the program to determine if your situation applies.