it sat vacant and I didn't claim anything.
If it sat vacant and you did not convert the property to personal use at the end of 2017, or the start of 2018, then you were "required" to claim depreciation on the property. If you did not rent *AND* did not make any attempt to rent the property out in 2018, then you "SHOULD" have converted it to personal use with a conversion date of 1/1/2018. If anything, you would do that to stop depreciation. However, that creates it's own issues that are specific to the turbotax program.
When you convert the property back to a rental, the program does not, can not, and will not "correctly" account for the prior depreciation taken unless you basically "lie" to the program and change your original "in service" date to "cancel out" the personal use period. It's a real cluster.
So at this point, the question is, was the property "available for rent" for all of 2018? If you lived in the property for one single day as your primary residence, 2nd home, vacation home or any other "personal pleasure" use, then your only correct answer to this question, is no.
