For example, if I have an investment account with Fidelity where I gained $2,500 from selling one stock and lost $2,000 from selling another stock, and at the same time, I have a Coinbase account holding crypto where I sold one crypto at a loss of $1,000 and another crypto for a gain of $2,500, how is everything calculated? How does the $3,000 capital loss deduction interact with this scenario?
When your annual tax return is prepared, all capital gains/losses from all sources will be consolidated together on Schedule D, attached to your form 1040.
All sales are divided into two groups:
The net result of short-term and long-term gains/losses are combined to determine the net capital gains amount. If there is a net loss, up to 3,000 can be deducted from other income, the remainder of the loss will carry over to future tax years.