I take it you got the date right, I was expecting you to get wrong. At the very beginning it asks you the date the business was opened. You enter the "original date" you opened it as a sole proprietor on your SCH C, even it if was years ago. If you don't, then when you go to enter an asset's "in service" date of the original date placed in service on your SCH C, it won't let you. Yes, you will use all the original dates for everything, as reported on your last SCH C in your personal tax return that you filed with the IRS.
Remember, on your last SCH C you did not "dispose" of any assets. You merely removed them from the SCH C business, is all. When you enter them in TT Business, the date the business acquired it/put the asset in service, is the same date as was entered on your SCH C.
