Each year, my own COA gets smaller and smaller. I like to track certain things separately, but I use sub totals so the report I send to the preparer has just what they need without having to add or subtract from multiple COA figures.
Internally, Paid by CC, Paid by check, two other sources, and one for returns. But the preparer sees only a gross number as their process does not need to show returns separately.
Deductions: Officer Comp, Other salaried/wages. Taxes and licenses, Interest, Depr, Advertising, and other deductions. I did not ask them to use and show these, they just "do", likely based on how few separate figured I give them. Internally, I have many items I still track separately, even getting as close as I can to separating each employee's costs (because we get reimbursed some via a work study program, and at first, and at first, WOTC).