Sft 2017-18

Hi, 
I am a retailer having cash sales in excess of 50 Lakhs in a financial year. I deposit the same in parts across the year. 
Is SFT applicable to me? 
Do I have to file form 61A or will the bank be responsible to file the same? 
And what to file in Preliminary Response under SFT? 
Whether to select 'Yes' or 'Not Applicable' in preliminary response against the option SFT 003 i.e. Cash Deposits or Withdrawals in Current Account? 

Kindly guide me in this matter.

SFT 003 is not for You. You are covered under SFT if u are having Audit U/s 44AB. And if yes, then Point SFT 013 will Apply to U. i.e. Cash Sale of 200000/- or more in a Single Bill.