I got CP504 for the year 2024 to pay $25K, when I created my account with IRS I found that I owe $17K for 2023 and $20K for 2022. When I spoke to a Turbo rep. to resolve in Get your taxes done using TurboTax
Out-of-state sole-proprietor LLC with CA income, but MyFTB requires previous CA return to pay estimated taxes? in State tax filing