Are there any firms that do a good job (for a good price) preparing tax returns for an LP with Section 475 (MTM) election? All trading has been done on Interactive Brokers. I imagine there are firms set up to extract everything they need from IBKR's available activity exports.
I spoke with https://greentradertax.com/ a while back. They were super knowledgeable about S.475, but I don't know what their fees are.