wash sales won't matter. you say you had no open positions in December 2019. so it would not be possible to establish positions in January 2020 that would be within the 30 day window that would result in losses in 2019 being suspended. on wash sales the broker would add the disallowed loss to the cost/basis of the shares that created the wash sale so selling them and not reestablishing a position on them within 30 days would result in recognizing the total loss in 2019.
