I inherited Manulife stock several years ago from my Mother. I sold it last September, 2018. The 1099B I received showed a portion of the proceeds Non-covered, with zero Cost Basis. Per phone conversation with Manulife, cost was not given due to stock split before I inherited. Can I use the MV of the stock at the time of my Mother's passing on my Federal Income Tax Form 8949? Or could I use the actual cost at the time I took possession?
