ExpressExtension is an industry-leading IRS-authorized e-file provider of IRS tax extensions. With over a decade of experience in the IRS tax e-filing industry, we are proud to offer our clients an Express Guarantee to tax extension forms 4868 and 7004. This means that all clients who file a duplicate Form 4868 or 7004 and receive an IRS rejection citing a code [R0000-902-01] or [F7004-011-03] will be refunded automatically. Please note the express guarantee is NOT APPLICABLE for Tax Professionals, prepaid credits, and package pricing.