Please follow these steps to install Anydesk on Raspberry Pi:
1. Download the .deb file from https://anydesk.com/download?os=raspi
2. Go to the downloaded location, where you have download the file “anydesk_5.5.5-1_armhf.deb”
3. Type following commands under terminal
# sudo dpkg -i anydesk_5.5.5-1_armhf.deb
# sudo apt-get -f install
4. Access Anydesk from Internet menu.