The routing number to use is the one that is associated with the State you opened the account.  For example, if you opened a WellsFargo Account in Georgia, the number is 061000227, if you move to Florida with their routing number 06307513, and you did not close the Georiga account to open one in Florida, you would use 061000227 for the routing number of your account.

However, as VolvoGirl mentioned above, you should also contact your bank to verify.  This is the best way to be more accurate when completing your return.