I received a check from my employer that is to be deposited into my Charles Schwab brokerage account, do I enter this amount I received anywhere?

It depends on when and why you received the check. I recommend calling the contact number at Charles Schwab for further clarification. 

The check is from my employer as a profit sharing thing instead of a IRA/401k

if this check was issued this year, you will probably either receive a 1099R for it to be reported on next year's taxes or it may be a taxable event reflected in your next year's W2.  In any case, this will be reported in your 2020 return.