1. Stocks. Your broker platform should have forms that they have sent copies of to the IRS that report your capital gains.. Download those forms and print them out.
2. If you have worked a job, you may also have a W2 form that has been mailed to you. Print that out if you don't already have the paper copy.
3. Get a record of your crypto transactions. What you paid for them and what you sold them for. Print those out. The difference between your purchase price and your sell price is your realized gains/losses.
4. Go through TurboTax like Philly suggests and fill it out based on the documents from 1-3. If you get confused going through TurboTax or if it's not clear what you're supposed to do, then take your documents from 1-3 to a tax preparer like H&R Block for them to create your tax return for you.

You got this ;)