Tax experts are warning about two scams targeting American taxpayers this year as millions of refunds increase. One involves ghost preparers who complete tax returns but refuse to sign them. These individuals often offer fake promises or demand cash-only payments. Tax experts advise never signing an incomplete return and verifying tax preparers are in the IRS Tax Preparer Directory. Meanwhile, 21% of Americans plan to use AI to help with their taxes, but caution against using public models like ChatGPT.