Why did you take the depreciation off in 2019? It could be that you didn't need to remove it in 2019 and you may want to amend the 2019 return to put the depreciation back on it for that year. If you are able to do that, then you can continue to use the same methods, amounts, placed in service dates as previously.
If you are able to amend the 2019 and not take it out of service as a rental, you will have to add it for 2020 as a new asset placed in service, but still using the original placed in service dates and information.
