In astrological tradition, the Neptune governs imagination, dreams, and the dissolving of boundaries, while Taurus is a earth sign read as steady, sensual, patient, and fond of comfort.
So Neptune in Taurus is often read as a placement where where intuition, art, and longing tend to gather takes on a steady, sensual quality. Tradition holds that someone with this placement tends to dreams and idealizes in a way that feels patient — coloured by the earth-sign temperament of Taurus rather than by any single rule.
None of this is a prediction or a fixed trait. These are tendencies astrologers have long associated with Neptune in Taurus, and how they actually show up depends on the rest of the chart — the houses, the aspects, and the other placements that this guide cannot see.
A general guide to astrological tradition — tendencies, not predictions. It describes the placement in the abstract and is not about any specific person.