There isn't a readily accessible fuel pump shutoff switch on a 2000 Dodge Stratus like you might find in some other vehicles. The fuel pump is controlled electronically, and disabling it requires disconnecting the fuel pump relay or fuse. However,
this is not a recommended procedure for casual users, as it requires working under the hood and knowing which relay/fuse is the correct one (incorrectly removing a fuse or relay could damage other systems).
If you need to disable the fuel pump for safety reasons (e.g., a fuel leak or fire), your best bet is to disconnect the battery's negative terminal. This is a much safer and simpler method.
For any other fuel system issues, you should consult a qualified mechanic.