I only think about taxes in April, when it's too late to change anything
By the time your return is being prepared, nearly every opportunity to change the outcome for that tax year has closed. Retirement contribution deadlines, a decision to put a spouse or the kids on payroll, and reasonable compensation adjustments almost all fall before December 31, and a preparer who only sees you during filing season has no chance to raise them in time.
This reactive pattern is especially costly in a year with a big jump in profit, a truck fleet expansion, or the sale of the business, because those are exactly the years where planning ahead produces the largest savings.
An owner who misses a single year-end planning window in a strong profit year, or the year the business sells, can overpay by tens of thousands of dollars in tax that no amount of clever preparation in April can recover.