How are you handling your taxes this year? US sellers, 1099k

I just sat down to work on my 1099k from Paypal and the site I have used for years (FreetaxUSA) is leading me to list my sales as personal items sold, and asking me for date acquired and date sold. Having a bit of a deer in headlights moment. I sold a couple thousand records last year on Discogs—had to drop by prices by about 25% to keep the sales moving so made far less in profit than years prior. Obviously I can’t track every single sale individually. How are you handling it?