The puja is to be performed in the morning along with sunrise or in the evening during the Pradosh period (1.5 hours before sunset).
On day wake up at sunrise take bath and offer prayers to Ganesha.
Sit facing the northeast corner of the office or business establishment. Keep an image of Goddess Lakshmi and the account book or tablet or whatever you use to keep the account.
Light lamp using pure cow ghee. Offer yellow flowers. Offer sandalwood paste. Light natural agarbatti of yellow flowers or sandalwood. Offer yellow color fruit.
You can also make yellow color sweet and distribute it.
Draw swastik or tilak on the chandan book. Write om in the book or whatever you write regularly first in the book. Keep a yellow color flower in the book.
Chant this mantra 108 times
Om shreem hreem kleem Mahalakshmayo Namaha
In a yellow color cloth keep a coin, yellow color chandan, yellow flower, mustard seeds and 7 clove. Tie up the cloth and keep it along with the account book or in money safe. It should be kept till the next year and thrown after next year puja under a banana tree.
Eat simple vegetarian food on the day especially of yellow color.
Feed cow or other animals on the day.