Since you state you put the property into an LLC and further state you're using TurboTax Business (different from Home & Business) that tells me the business is a multi-member LLC that will file IRS Form 1065.
The open/start date of the LLC **MUST** be the same date the rental property was first placed in service. It does not matter if that date was years ago either. Since ownership of the property did not change due to you selling or gifting the property to another individual, that's how you correctly do it.
This is because you can not place an asset in service, before the business is "open for business". Therefore, your multi-member LLC was "in fact" open for business on the date the rental property was first placed in service.
Then when you close out the SCH E on your personal 2019 1040 tax return you will show the disposition of that property and all of it's assets as "removed for personal use". This will effectively make this the last year you will report that rental property on page 1 of your personal 1040 tax return SCH E. Once done, you will need to print out the IRS Form 4562's for that specific rental property. THere will be two of them and they both print in landscape format.
WHen you enter the rental property in TurboTax Business all information will be "IDENTICAL" to what is on the 4562's you printed from your personal return - with one exception.
When turbotax business asks you for "prior depreciation already taken" the amount shown will probably be wrong and you can change it. To get the correct amount, add together the amounts from the 4562 in the "prior years depr" column and "current year depr" column, and enter that total in TurboTax business as your total prior depreication already taken on the asset.
YOu have to do this for each individual asset listed on the 4562.
Once you've completed the 1065 partnership return, you'll print out the K-1 for each partner (including you) and you will enter that K-1 on your personal 1040 tax return. When done, the SCH E page 1 will show rental icome/expenses for the period of time it was "NOT' in the LLC, and the SCH E page 2 will contain information from your K-1.
This means that 2019 will be the last tax year you will report anything for this rental on page 1 of your 1040 SCH E. From 2020 on all of your rental stuff will show up on page 2 of your 1040 SCH E, after you have entered the K-1 information.
