Depreciation recapture is reported as ordinary income.
It will be on your Schedule 1 line 4.
The recapture will happen when you finally sell the vehicle.
NOTE:
If you sell a business vehicle at a loss when in business, the depreciation is recaptured as ordinary (personal) income, but a business loss can also be taken on the sale.
If you switch it to personal use, and sell it later at a loss, the depreciation recapture is again ordinary income, but the loss is disallowed since it is now a personal asset.