I am changing my old gas stove and putting in a electric one. Is there anything I need to do besides shut the gas off? Thanks any help would be appreciated.

You must cap off the old gas line - don't just rely on the shut-off valve. And your new stove will require a 220V line (if one is not already in place).

I am changing my old gas stove and putting in a electric one. Is there anything I need to do besides shut the gas off? Thanks any help would be appreciated.
Do I have to shut the gas off in the basement to do this? Or can I just shut it off at the valve? And what do you mean by a 220v line?

There should be a shut-off valve in the gas line immediately behind the stove - where the line comes out of the wall or through the floor. That's the one I meant. Turn that valve off, disconnect the old gas stove, and then cap the gas line with a proper threaded cap.

Your electric stove runs on 220 volt electricity, not 110 as is normally run through the house (I'm assuming you are in the US). You should get an electrician to run the proper electric line from a dedicated circuit breaker and connect your stove to it.

The cap or plug should use pipe dope and tighten it about 2 turns past finger tight.

Hopefully, your electric panel and service can handle the extra load.

We've applied a threaded cap to the gas line behind stove and checked to make sure valve is off but I still smell faint hint of gas... where else should I check?

Depending on the electrical configuration, you may have a 120/240 VAC range. Heating element is 240 but light is 120. (110 and 220 don't exist in the US anymore). Has the electricity been connected yet?

It would be best for you to cap the gas line where it originates in basement. Natural gas is odorless so ethyl mecaptan is added to give it a smell. This chemical can linger around gas lines and fittings, but I would not assume that. You can use soap bubbles to test for leaks. Sometimes valves leak from the valve stem if seal is worn, so cap it off at the source, which is easy to do. Cut off main gas and disconnect line going to stove, then use a plug or cap and pipe dope to seal off line. That is the safest way to go.