sbi will not deduct tds unless the total interest from all of the FDs cross 50k in all sbi accounts for the current financial year.Even if does cross the limit, then you can submit form 15G (age below 60) for income less than 4 lakhs under new tax regime and form 15H (age above 60) for income upto 12lakh under new tax regime,provided that you file your ITR properly.