Can you file taxes with more than one company?

You can use a different company every year. You don't have to use the same one you used last year.

You can even ask two different companies to prepare your returns and then compare the results to see who did a better job.

But you can only file one time. Don't ask two companies to both file.

If one company made a mistake and you don't trust them anymore, you can ask another company to file an amended return for you.