The Indian Partnership Act, 1932 defines a partnership as a relation between two or persons who agree to share the profits of business run by them all or by one or more persons acting for them all.
The documents that may be required to be prepared are:
Letter of intent or memorandum of understanding which includes details of proposed agreement, preconditions, key obligations etc.
Partnership agreement
Confidentiality agreement
The partnership can be of 4 types
General partnership
Limited partnership
Limited liability partnership and
Public private partnership.
You can discuss with your chartered account on all such further issues.