I'm pretty sure that TurboTax DOES keep track of the Vacation Home Carryovers (ProSeries does).
If you have the CD/downloaded version, you can go in the "Forms" to see the Schedule E Wks. Below the section that shows the income and expenses are a bazilliion other things. If you scroll about 75% down on the Schedule E Wks, I think you'll find the "Carryforward to 2024 Smart Worksheet".
