Tasmota supports automatic discovery by Domoticz through the Domoticz MQTT Discovery plugin. You must have installed Domoticz and a Mqtt Broker.

Accept New Hardware devices must be enabled in the Domoticz settings.

Download Automatic discovery plugin, unzip the downloaded zip into the Domoticz Plugin folder and restart Domoticz.

https://github.com/emontnemery/domoticz_mqtt_discovery

When installed, add new Hardware.

Name: Name for your Hardware choose it yourself.
Type: MQTT discovery
MQTT Server: Your Mqtt Broker IP
Port: your Mqtt broker port
Username: your client username (optional)
Pasword: your client password (optional)
Discovery topic: homeassistant (don't change if you use default Tasmota settings)
Ignored device topics: tasmota/sonoff/ (don't change if you use default Tasmota settings)
Debug: Verbose

Now add your hardware.

Now we setup your Tasmota device:

Open the Tasmota web-gui. First setup your MQTT Broker.

Click Configuration.

Click Configure MQTT.

Host: Your MQTT Broker ip.
Port: your MQTT port

Optional:

username and password to login

Topic: Device name

now click Save, your device will reboot

Now we enable Home Assistant automatic discovery.
At the Main menu click console.

type SetOption19 1 and hit Enter

SetOption19 1

Domoticz Automatic discovery plugin is ready for use.