07 July 2012
Normally the C form is used for Inter State Purchase/Sales. The purpose of issuing C form is to procure goods at a concessional tax rate. otherwise you hv to pay a normal tax of 12% or so. If you give C form the tax rate is approx 4%.
22 August 2012
Agreed with the expert. Now the rate of CST is reduced to 2% against C form and the rate of tax without c form will be 5% or 14.5% as per the local vat act. The rate i mentioned is for Tamilnadu. CST 2% is applicable throughout india.
Regarding your second query, you should report the interstate purchase/sale in the annexure prescribed in the monthly vat return. If omitted, you can show in the next monthly return or revise the return,
28 December 2012
Agreed with the Expert Rengaraj R.K. but it is cleared that when central purchases issued C-form if purchases against it and when central sale received C-form form the parties if sale against this form.
Secondly,submit the revised return and firstly applied for this forms then receive / claim the c-forms from the department through the documentary supports like purchases bills as well as transport receipt/way bills etc.