Income tax vide Circular No. 12/2020 dated 20th May 2020 it is hereby clarified that the provisions of section 269SU of the Act shall not be applicable to a specified person having only B2B transactions (i.e. no transaction with retail customer/consumer) if at least 95% of the aggregate of all amounts received during the previous year, including the amount received for sales, turnover or gross receipts, are by any mode other than cash. Section 269SU section requires every person carrying on business and having sales/turnover/gross receipts from the business of more than Rs 50 Crores ("specified person") in the immediately preceding previous year to mandatorily provide facilities for accepting payments through prescribed electronic modes (Debit cards/Unified Payment Interface (UPI)/ Unified Payment Interface – Quick Response Code).
https://www.incometaxindia.gov.in/communications/circular/circular_no_12_2020.pdf