Requesting extension. Don't think we owe. How do we send electronic form if we don't owe?

[AnthonyC]

If you are expecting a refund, you actually don't have to file an extension as the penalties are based on taxes owed - so there is no penalty for filing late with a refund.

But, if you want to file an extension just in case (which is a smart idea this year due to all the tax law changes), then you should be able to just enter "0" for the fields in the extension form and file the extension with a $0 payment.