Tax professional.
Most clients think that the best tax Pros necessarily get them bigger refunds. If you get a smaller refund in a particular year it may be because tax laws change, because you didn't pay in as much, or because you didn't have as many deductions. Explaining stuff to people doesn't work if their eyes are all glazed over because tax law discussions bore them
Going to another tax Pro to get a bigger refund, thinking that that tax Pro is "better" may just get you an audit
But the worst myth about taxes manifest itself when scammers call people on the phone climbing to be IRS agents. They tell folks that they owe money and that authorities are coming to their house to put them in jail if they don't pay up. The truth is that the real IRS does not call anyone on the phone unless they have contacted IRS first and are expecting them to return the call. IRS does not accuse you of text fraud. Even if they truly believe you have committed tax fraud they will simply send you a letter stating that they think you have underpaid your taxes. They will give you a chance to prove your case. If you don't do this or pay them what they say you owe, they will simply Levy your paycheck or your personal property. They do not show up at your house to put you in jail. So please if a scammer calls you do not give them your credit card information or give them payments in any form. Call the real IRS and report them.