Uttara Kalamrita : Section VI: Sloka 34, 35,36 : Solar Return Chart

when the Sun returns to the same position as in the natal horoscope to the same degree, minute and second, that is the solar return day of year for the native.

Calculate the houses and planets based on the time of the solar return, this horoscope is called the varshphala or the solar return horoscope.

Calculate the sapta vargas for the time. Calculate the strength of the planets based on the above the yearly prediction of the native is to be forecast.

Count from the natal start to the moon constellation on the solar return day, divide this by nine, the remainder is  counted from the sun to arrive at the dasha sequence.

The order for dasha sequence is Sun, Moon, Mars, Rahu, Jupiter, Saturn, Mercury, Ketu, Venus.

The horoscope analysis, predictions and forecast for the native is to be done based on the strength of the planets, the houses, the lagna (ascendant) and the dasha running.