Moon conjunct to Neptune in the solar return chart can show both increased sensitivity to life's subtleties and increased uncertainty.
It is common when intuition increases that one is not sure what is true or real. Confusion results because the greater sensitivity relates to feelings, thoughts, and insights that are not expressed openly, and therefore subject to interpretation.
Perceptions can be subtle and fleeting. "Did I really sense that? What just happened!' As a result, one tends to be unsure of life, relationships, events, and facts. Even when there is greater clarity, some will discount the signs and nuances to their own detriment.
There are both negative and positive manifestations suggested by Neptune conjunct the Moon. Negatively, you can be misinformed or even lied to, especially if someone is actively trying to deceive you while details are not verifiable. This person may be a family member or someone you are emotionally involved with.
The Moon-Neptune house position in the solar return will give you a clue in regard to where