There are several ways:
1. Register in the "Мой налог" app:
download for Android - in Google Play
download for iPhone - in App Store
You can also get self-employed status in the web version of the service.
When registering, enter the phone number to which the confirmation code will be sent. Next, you need to specify one or more types of business.
2. You can register the status of self-employed through "Sberbank Online" app. Here find the service "Свое дело". Further steps are described in the video:
WATCH When you received the money for renting an apartment, you need to generate a receipt in the "Мой налог" or Sberbank Online app and send it to the email: orders@colife.ru
How to do this is described here:
WATCH