This year I started learning about day trading and did mostly short term trades. Like most newbies, I lost money this year (about 3k loss overall). I'm not used to seeing such large numbers under proceeds/cost basis and wondering how taxes will work with this.
Yes.
Enter under
Personal Income
Investment Income
“Stocks, Cryptocurrency, Mutual Funds, Bonds, Other”
You have the option of importing from your brokerage or entering the information yourself
Depending on the mix of your investments, you might have the option to enter "Sale Section Totals" saving you the time of entering each transaction.
(If you enter as a summary, you need to mail copies of your trade statements with Form 8453 to the IRS separate from your 1040)
Below are some links that should be helpful.
Here is a link for entering a large number of transactions using TurboTax.
HERE is a link discussing the qualifications of filing as a Trader
HERE is a link about filing with and without a Mark-to-Market election if you are a Trader