If you check out my tutorial "Home Direct", I show how to use base approach for a direct re-entry from the moon. it's very similar returning from another planet, although you may need to increase the Ant to compensate for a longer aerobrake due to the higher velocity. You will Alt and REA can be left at the default. Increase HInt until a solution (blue lines, and extra data) is shown (usually this will be close to the PeT shown by IMFD's Map program).
Note: the Ant will vary greatly depending on the type of craft you are using. A Deltaglider type craft has a MUCH larger Ant than a capsule. The default Ant is based on a capsule, but I think it's short even for that.