A client sold an investment property in 2021. There is a moderate gain. 

Come to find out, he lived in the property from 2014 until 2018. Theoretically this should qualify him for the main home exclusion or at least a partial exclusion?

This was a rental after he moved out so it is an asset on schedule E. So normally I would just send it to 4797 but I have no idea how to split that with the home sale worksheet which is where I would normally generate the exclusion. 

Is there any way to do this?