Gstr 3b wrongly submitted

Thanks for help, it means a lot,

Now the liability becomes 5 lakh ,  i read the Notification No. 17/2017 

ir says " Where a return in FORM GSTR-3B has been furnished, after the due date for furnishing of details in FORM GSTR-2—

Part A of the return in FORM GSTR-3 shall be electronically generated on the basis of information furnished through FORM GSTR-1, FORM GSTR-2 and based on other liabilities of preceding tax periods and PART B of the said return shall be electronically generated on the basis of the return in FORM GSTR-3B furnished in respect of the tax period; (b) the registered person shall modify Part B of the return in FORM GSTR-3 based on the discrepancies, if any, between the return in FORM GSTR-3B and the return in FORM GSTR-3 and discharge his tax and other liabilities, if any; (c) where the amount of input tax credit in FORM GSTR-3 exceeds the amount of input tax credit in terms of FORM GSTR-3B, the additional amount shall be credited to the electronic credit ledger of the registered person.”

it means, after submitting correct GSTR 1 , and electronically generate GSTR 2, the liability will reduce automatially ??

is it correct ?, because the client has not yet filed the return becauase of huge liability

i talked with GST help line, 5 times and everytime they said, you no need to deposit tax, once you do the correction in GSTR1, liability will automatically reduce , but in notification no 17/2017, the first line is "Where a return in FORM GSTR-3B has been furnished" 

please help, thanks in advance

sanjeev