Sun in 12th House in Astrology does well except the Moon, but, the Sun sheds his light on this house giving the native zero worries under a stressful situation. No matter what the problem is, the native will sleep soundly and will be able to see all the secret dealings happening against him or her. Sun in 12th House in Vedic Astrology also can take a native to foreign lands especially for cancer and Leo ascendants.
The 12th House in Astrology is a mystery, your hidden talent, your hidden magic, foreign country settlement, losses but, not necessarily loss of money, it could be loss of enemies or health, as in, you’ll lose enemies, which stands for: you may not have many enemies, or you may not have too many diseases in your possession. If you look at this house carefully, 12th house which is known as the house of losses or expenditure can also work to your advantage as well. We’ll talk about this later. But, 12th house is a major player in the careers of fictional writers, as 12th house takes you into a different dreamland, and dimension which is required for a fantasy writer.
The 12th House in Vedic Astrology represents the final stage of life and the inevitable death. Any loss or expenditure is signified by the 12th. Positive applications include investments, donations, and getting rid of unwanted things. Negative applications are death, losses, unexpected expenses, theft. The 12th house represents the last portion of the legs, the feet. The 12th house corresponds to Pisces. Jupiter adds a spiritual value to the 12th, and the loss of bondage to the relative aspect of life is indicated: enlightenment or, in Sanskrit, "Moksha."
Sun in Vedic Astrology represents the soul. This can be read in the most flexible and general sense of the word. The word soul is used for the deepest and truest nature, for the ultimate sense of identity, inspiration, and aspiration. Surya signifies one's essential attributes - the sense of self, ego, self-esteem, a sense of purpose, and so on. Energies and conditions that arise from the Sun's placement in a horoscope, along with the influences that the Sun receives, will be experienced in life as deep, long-term trends and processes that impact one's life as a whole.
Note: The degree of auspiciousness and inauspiciousness will depend upon a complete analysis of the horoscope (birth-chart).