All five platforms below send Form 4868 to the IRS for a personal return. Every one of them opens with a registration screen before you can see the form. Only two say in advance what that form will want from you. With the other three, you find out after signing up, which is a good reason to pick your platform well before April.
What You Need Before You Can Start
Each of these companies prepares tax returns as its main business, and the extension is one item in a catalog built around Form 1040. The account you open to send a 4868 is the account the platform expects your October return to come from. The extension screen asks what the return screen asks.
Form 4868 itself wants basic personal details, including your Social Security number. If a payment goes with the request, it also wants an estimate of what you owe. Nothing else is required. The IRS does not ask for a reason, and every US taxpayer can ask.
One thing narrows which platforms will take you. If a company’s return software turns your situation away, it will not carry your extension either. Cash App Taxes spells that out in full. TaxAct publishes it for one edition, and the other three publish nothing current.
1. FileTax.com and What It Asks For Up Front
FileTax.com tells you what the extension form will want before you open it. It asks for basic personal details, including your Social Security number, then an estimate of the taxes paid and what you expect to owe for the applicable tax year.
You need an account first here, as you do everywhere on this page. Opening one takes an email address and a password. Stop halfway, and the site keeps what you have entered, so you can come back and finish from where you left off.
The site also says what happens once the request goes out. It tells you an e-filed extension is typically acknowledged within hours, and that the status stays in your dashboard. The same account handles the October return, because FileTax.com prepares returns as well as extensions.
2. TurboTax and Its Standalone Extension Site
TurboTax runs the extension as its own product on its own subdomain, called Easy Extension. You do not need a return in progress to use it. You start with an Intuit sign-in, because the extension page sends you to that sign-in screen before it hands you off to the tool.
TurboTax publishes no other condition for starting. It does not say what the extension form will ask for.
It states one product limit outright. You generally cannot get a second extension on the same return, apart from a few cases TurboTax names as exceptions.
3. TaxAct and the Account You Sign Up For
Both ways into the extension on TaxAct’s page open the same registration screen as its 2025 federal return product, under the same product code. To reach the extension you sign up for the return software.
TaxAct prints something none of the others do. Where you filed the extension does not bind where you file the return. The page says it twice, once in the body and once in the FAQ.
If you need a state form, TaxAct says its program flags that during the filing steps, and it keeps a published list of the states whose extension forms it can e-file.
4. Cash App Taxes and Its App Requirement
Cash App Taxes asks the most of you before you start, and it says so in full. To use the tax product you download Cash App on a phone and open an account behind a verified phone number. The requirement appears on the main taxes page, well ahead of Form 4868. The extension help article never mentions it.
Form 4868 is a supported form inside the return service, and there is no standalone extension product to start from. The limits on that service reach the extension as well. Cash App Taxes will not handle:
- Filers under 18.
- Filers living outside the United States.
- Multiple-state, part-year and nonresident state returns.
- Prior-year returns or foreign earned income.
- Form 2210, which means no underpayment penalty gets calculated.
Read that page once and you have your answer before opening an account.
5. e-file.com and Its Checklist of Inputs
e-file.com publishes a checklist under the heading What You Need To File Form 4868. It asks for your name and address as the Social Security Administration has them, and it tells you to update the SSA record first if your name has changed. It wants a Social Security number for you and for a spouse on a joint filing. It names the ITIN for a non-resident without an SSN. It asks for an estimate of your total tax liability, the payments you have already made and the balance left. It warns that an unreasonable estimate can invalidate the extension.
The extension has its own entry URL, though it opens the same account the return product uses. The extension comes first by design here, and the return software opens afterward for a filing before October 15.
When the Next Request Window Opens
The window to ask for a 2025 extension closed on April 15, 2026. The extended return is due October 15, 2026. Three of the five carry a closed-season notice now. TaxAct’s is the most specific, naming the end of January, when the IRS typically opens the new filing season.
e-file.com is the exception. You can still start there, with no closed-season notice, while its own deadline table gives April 15, 2026, as the last day to file Form 4868. The banner at the top advertises a 2024 return, a full tax year behind the page body.
If you are reading this in the fall, you are early for the next cycle. Pick the platform now, check its published requirements against your own situation, and open the account in the spring.
Business Extensions Use a Different Form and a Different Date
Everything above applies to a personal return. A business entity uses Form 7004 instead, and its deadline comes earlier. In 2026, it was March 16, against April 15 for an individual. TurboTax runs the business extension as its own product on that March date.
A platform that will file a tax extension for you as an individual does not necessarily file one for a partnership or an S-corp. Check the business route before you assume one account covers both.
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