Chia Burn Address

tl;dr

Mainnet Burn Address

xch1qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqm6ks6e8mvy

Testnet Burn Address

txch1qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqm6ksh7qddh

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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 traditional 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 for mainnet: xch1qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqm6ks6e8mvy

The testnet burn address is different: txch1qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqm6ksh7qddh

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

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