Inherited collectibles: how to establish cost basis?
My mother died last September, and I am the executor of the estate. She left a revocable living trust, listing collectibles (art/books/antiques) and house. The collection of collectibles is huge--thousands of items. I got the collection professionally appraised by category, but not individual items. All assets are well under 11 million, so not subject to federal estate tax as I understand.
I understand the cost basis of the house and collection will be stepped-up to date of death.
Late 2021 I sold a small portion of the collection, with money going to the estate bank account, which will be distributed to beneficiaries. In 2022 I hope to sell the remainder/bulk of the collection, again with all proceeds going to the estate account, to be distributed to beneficiaries.
I believe I need to file a 1041 form, for estate income, but don't know how to determine cost basis for collection items. Do I need to get every single item appraised? Is it too late to do that now?