Originally posted by : rocky
	raja sir, in march 18 we did not show debit note, because party has not issued credit note

Well....

You can show the details in Your next GSTR-3B

Originally posted by : prasad
	but allowed only 6 month or not

Section 34 : “Credit and Debit Notes” (CGST Act, 2017) :

(2) Any registered person who issues a credit note in relation to a supply of goods or services or both shall declare the details of such credit note in the return for the month during which such credit note has been issued but not later than September following the end of the financial year in which such supply was made, or the date of furnishing of the relevant annual return, whichever is earlier, and the tax liability shall be adjusted in such manner as may be prescribed:

Provided that no reduction in output tax liability of the supplier shall be permitted, if the incidence of tax and interest on such supply has been passed on to any other person.