How can I mirror my iPad to TV?

This will in part be determined by your iPad model.

If your TV supports AirPlay, you can mirror your iPad screen wirelessly to the TV:

Use AirPlay to stream video or mirror the screen of your iPhone or iPad - Apple Support

If instead you intend to connect your iPad to the TV using a wired connection, if the iPad has a Lightning port, you will require a Lightning to HDMI Adapter. For example:

• Lightning Digital AV Adapter

https://store.apple.com/xc/product/MW2P3ZM/A

Newer models of iPad have a USB-C port. For these, when connecting via an HDMI connection, you will also require an appropriate USB-C to HDMI Adapter:

• USB-C Digital AV Multiport Adapter

https://store.apple.com/xc/product/MW5M3ZM/A

Depends on your TV.

If your TV supports Airplay , click here ➜ Use AirPlay to stream video or mirror the screen of your iPhone or iPad - Apple Support

If your TV requires a direct connection, you can use a digital AV adapter with your iPad and HDMI cable to connect it to your TV.

Also, what iPad model do you have exactly?