Form 8878
IRS title for this form number: “IRS e-file Signature Authorization for Form 4868 or Form 2350”. Other rows in this family carry slightly different titles, listed verbatim below.
2 records in this family: 2 Form rows, 0 Instruction rows, 1 other-language row. Every link below goes to the IRS’s own PDF for that record.
Form
| Record id | Product number | Title | Revision date | Posted date | Language / edition | IRS copy |
|---|---|---|---|---|---|---|
| Form 8878 | Form 8878 | IRS e-file Signature Authorization for Form 4868 or Form 2350 | 2025 | 01/07/2026 | English | Open the IRS copy |
| Form 8878 (sp) | Form 8878 (sp) | IRS e-file Signature Authorization for Form 4868 or Form 2350 (Spanish Version) | 2025 | 01/08/2026 | Spanish | Open the IRS copy |
Other-language versions are inside the tables above, each with its own link: Form 8878 (sp). They are also collected on the other-languages page.
Source: IRS listing, retrieved September 2026. Record ids: Form 8878, Form 8878 (sp).
Every revision date, posted date, title and PDF link above is copied from the row with that record id in the listing, unchanged.
Full listing: IRS, ‘Forms, instructions and publications’.
Where this form number sits
These links are other pages on this site, built from the same listing. They are navigation, not advice.