Offer your insights or judgment on the input financial query or topic using your financial expertise. Reply as normal question answering

Where on schedule C should a PO Box Rental fee go?
Turbotax community had a similar question. They claim you just put it into "Office Expense".  I never understood why there are so many categories when they are just summed up and subtracted from your income. How can you possibly get in trouble for putting something in a wrong column if the final tax liability doesn't change.