02-24-2025 Update:
(I'm the OP) Last year I had already E-filed when I asked this question.
This year I put in the 999003 and TurboTax Business pops up an error msg saying
[-999003 was an invalid business code. Enter a valid code, or use the Find Business Code button-]
So I clicked that button and it said
[-Could not find Passive Income activities nor could it find 999003, No luck? Enter 999000 (miscellaneous) if you can't find a more specific code. It will not affect your tax return-]
So I'm back with 999000 again. Go figure.
