To exchange BTC to Tinkoff QR code, you need to follow a few steps:
Fill out an application, indicating the amount of btc for the exchange (please round the amount to a multiple of 1000), phone number and e-mail.
The QR code is sent only to the email address you specify in the application.
Read the terms of the agreement for the provision of exchange services, if you accept them, check the appropriate box. And create an application.
Wait for 1 network confirmation after sending BTC.