TurboTax Business won’t accept a service date earlier than when the LLC was formed.
That is correct. You can't possibly place a business asset in service before said business was formed. I suspect I know the issue here.
You were asked for the date the business was stated/opened/established (something like that)
Then you were asked for the date the corporation (or partnership) was formed. Those does do not necessairly have to be the same.
In the case of filing form 2553 to treat a single member LLC "like an S-Corp" for tax purposes, it's perfectly possible the LLC was established well before you incorporated. Therefore your "business started" date could be Jan 1, 2003 for example, while your incorporation date could be July 1st, 2023.
So if the asset was in service since Jan 1, 2023, that's the date you enter and it won't accept any date earlier than that.
