It doesn't matter how long you have been in business; there can always be a crisis.
Business is rarely "set and forget".
In the early years, the crisis is often viability and cash flow. In the maturity phase, the crisis may be exit and succession. A skilled business accountant will aim to smooth the crisis points at, and between each stage, done with collaboration and planning.
Seeing your accountant once a year at tax time won't cut the mustard when it comes to navigating a small business.
No matter what your stage in business be sure those lines of communication with your accountant are happening.
Check out my previous blog on tax strategy vs business strategy.