As a financial matter (non-tax), you also need to balance the cost of keeping the house for 9 months against selling it now at possibly a lower price. Unless you bought the house for cash, you have 9 months of mortgage payments, property taxes, utilities and insurance. Plus the risk that you won't find a suitable short term rental and the risk of a tenant trashing the place, and the time and effort cost of managing the rental or the money cost of hiring a property manager.
Assuming you can sell the house today for $X, and you can sell in the spring for $X plus $Y. $X is the easy money, and the plus $Y is the hard money, you are going to have to work for it, pay for it, and take risks. Is it worth the cost and risk to wait?
