To register for sales tax in Rajasthan, India, the following documentation is required: 1) Identity and address proofs for proprietors, partners, and business managers. 2) Details of commodities sold and purchased, as well as PAN numbers and photos of proprietors/partners. 3) Additional documents like rent agreements, power of attorney, cancelled checks, and stamps. 4) Guarantors are also required, who must be registered under the VAT act, and provide their firm details and TIN numbers. Alternately, a cash guarantee of Rs. 20,000 can be provided.