For Local/Single Registration
(1) Copy of PAN card of the assessee.
(2) Proof of the address of the premises to be registered/copy of telephone bill. Electricity bill. Rent agreement in the name of the company or in the name of proprietor/ partner/firm in the case of proprietary or document accepted by any of Central/ State Government Department e.g. i.e. Income Tax. Sales Tax. Registrar of Companies DGFT or passport in the case of address.
(3) In case of partnership firm: Copy of Partnership Deed.
(4) In case of companies: copy of Memorandam of Association.

For Centralized Registration
For Centralized registration in addition to the above documents. The proof of address in respect of each of the premises/branch for which centralized registration is sought for should be furnished in fine with the description mentioned at 2(2) above.

For amendment
Further there is no need to resubmit all the above documents for addition/ deletion of any services if already submitted to the Department earlier. However (in case of addition of new premises branch. proof of address in respect the new premise is to be submitted.)