New LLC end of year

I opened a new 1 person LLC end of December- it was supposed to be January.  This is just for day trading. I have not tried to get the designation of day trader as I just recently set up the brokerage account outside my IRA.  I've already been day trading awhile and doing okay.  I have some expenses I would like to put together against this year's profits.  Is that possible?  What would I need to do?

 

Thank you.