"C" Form is a important Declaration to be issued to the inter state supllier by a registered dealer against the inter state purchases during one quarter.
A dealer registered under CST act can apply for C forms by furnishing the details of the supplier,, bill detail, transit detail, road permit detail.. in a proper format issued by the sales tax dept of every state
And the same is to be shown by buyer and seller both in the monthly return of turnover.
The supplier has to obtain C forms from each of the interstate dealers, one C form for each quarter
By using C form the CST liability of the buyer turns 2%, whereas if the supplier fails to produce the C forms obtained from the buyers .. before the Sales tax department, the supplier have to deposit the sales tax @ local tax.
Sometimes the buyer fails to provide c form to the supplier, thats is why the supplier keeps a sum of amount , equivlnt to CST without C form, and same is adjusted when the buyer provides tge c forms to the supplier