The turnover of your client is close to Rs.15 lakhs and as you said it is a small retail shop in textile. For taking loan from banker, if he is running the business as a proprietor, he can obtain " Trade Licence" from the local municipal authorities. He can also obtain " Labour Licence" from conccerned labour department of the local area. ANy one of these two or both will serve the purpose. But remember these are to be renwed pediodically. You can file IT returns as well. If he is already running the business as a partnership firm, take the partnership deed and file Form No.1 under Partnership Act alongwith other papers like, rent deed, photos of the partners etc., depending upon the state the business is located ( the procedures and stamp duites change from State to State). In case of further assistance, feel free to contact