Chia Burn Address

tl;dr

Chia burn address: xch1qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqm6ks6e8mvy

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The Burn Address Explained

Chia addresses are puzzle hashes encoded into the "xch" prefix address format using the bech32m encoding scheme.

A standard bech32m puzzle hash for a burn address is all zeros ending in "dead": 0x000000000000000000000000000000000000000000000000000000000000dead

Converting this to an address, you end up with the burn address: xch1qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqm6ks6e8mvy

You can use a puzzle hash converter to verify for yourself.

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Thank you to r/chia user juraj for this information.