And I'm saying its a bad idea to rely solely on those 3rd party services to know whats what. Even Accountants. Certainly here in the UK, if your accountant messes up, you're still the one liable. You then have to chase after them for recompense, while they play the "you didn't give us enough information" or "read the T&Cs, we're not liable" game. I've seen it happen too many times.

By all means bring in the professionals to advise you and do the donkey work, but educate yourself on the rules and regs. "Trust but verify" their work.

It's always good advice for any consultant or company to have their accountant (and lawyer, if applicable) review anything related to their field. It's why we have them.

However I would not criticize a tool for not covering all the p's and q's of every country's tax and legal code. If every startup/SAAS had to handle all these cases, we would have far fewer of the cool services we use today.