FAQ: Will all Monero addresses change with Seraphis and Jamtis?

Yes.

In Seraphis and Jamtis all current 95-character Monero addresses and subaddresses as well as 106-character integrated address will become invalid, i.e. you won't be able to continue to use them. All wallets will get new Jamtis-style addresses which are nearly 200 characters long. Going forward there will be only one type of addresses instead of three.