I digress. As a TopStep trader, or as a trader for anyone (including yourself) yes, you can still deduct expenses i.e. home office, computers, etc. This information is all easily available on the IRS.org website IRS publications.The only negative feedback regarding to TST that I've for you is that not only you have to pay them 20% from your profits, but also you pay a lot of taxes since you are employed by TST which means you can't claim back any expenses like regular day traders do from trading their own accounts. Regarding to 80/20 split, I agree with Baron that it is a fair deal since TST provides you with their capital to trade.
