How to file Form 5500-EZ on EFAST2 IFILE
A procedural guide for Solo 401(k) sponsors who prepared a Form 5500-EZ packet and need to use the official DOL EFAST2 IFILE path.
Summary
Use EFAST2 IFILE only after you know Form 5500-EZ is required and electronic filing is the right method. Solo 5500 Desk can prepare the answer packet and source checklist, but the signer uses the official DOL EFAST2 system, manages Login.gov/EFAST2 credentials, signs, transmits, and saves the confirmation outside the app.
Solo 5500 Desk prepares the packet; EFAST2 IFILE is the official filing channel.
| Official system | DOL EFAST2 IFILEUse the official DOL/EFAST2 path or an approved vendor. |
|---|---|
| Credential boundary | User controlledDo not enter Login.gov, EFAST2 PIN, or portal credentials into Solo 5500 Desk. |
| Before filing | Review the packetConfirm trigger, deadline, filing method, identity, plan number, and source records. |
1. Confirm that Form 5500-EZ is required
Before opening EFAST2, confirm that the plan is in the one-participant lane, the combined one-participant plan assets exceed $250,000 or the year is a final plan year, and the return is original and on time. Late, amended, notice, employee-coverage, or complex asset cases should stop before transmission.
2. Decide whether electronic filing is required
The 10-return rule is a filing-method question, not the asset trigger. If the sponsor is required to file at least 10 IRS returns of any type during the relevant calendar year, official IRS instructions point to electronic Form 5500-EZ filing through EFAST2 instead of paper.
3. Prepare the packet before using IFILE
A useful packet should already contain sponsor name, EIN, plan name, plan number, plan year, beginning and ending assets, contributions, distributions, participant loan facts, final-return flag, filing-method note, and source-record references. EFAST2 is where those reviewed answers are entered, signed, and submitted.
4. Keep credentials and signatures outside the app
EFAST2 access, Login.gov credentials, User ID, PIN, signature, transmission, status checks, and accepted filing receipts belong to the official filing channel. Solo 5500 Desk should never request or store those credentials.
5. Save proof after submission
After using EFAST2 IFILE, save the submitted return, confirmation or status evidence, packet copy, year-end statements, extension records if any, and annual passport. Those records make next year's threshold, identity, and beginning-balance checks easier.
When to use a TPA, CPA, EA, attorney, or official help desk
Use professional or official help for failed EFAST2 credentials, rejected submissions, late or amended returns, IRS notices, Form 5558 uncertainty, non-owner employees, controlled groups, plan corrections, hard-to-value assets, or any question about fiduciary, ERISA, tax, or plan-administration advice.
Common questions
Does Solo 5500 Desk file Form 5500-EZ through EFAST2?
No. Solo 5500 Desk prepares a self-review packet. The user files through the official paper path, EFAST2 IFILE, or an approved vendor when electronic filing is required.
When should I use EFAST2 instead of paper Form 5500-EZ?
Use EFAST2 when the official instructions require electronic filing, such as the 10-return mandatory e-filing threshold, or when the filer elects the EFAST2 path and can manage the credentials.
What should I save after submitting in EFAST2?
Save the accepted filing confirmation, the submitted return copy, any EFAST2 status screen, and the source records used to prepare the packet.
Prepare the packet first
Use Solo 5500 Desk to organize the Form 5500-EZ answers and record checklist before using the official filing path.
Open checkerRelated guides
How electronic Form 5500-EZ filing works
When a Solo 401(k) sponsor may need EFAST2, why Login.gov credentials matter, and what packet-only software does not do.
Do I need to file Form 5500-EZ for my Solo 401(k)?
The direct filing test for one-participant plans: asset threshold, final year, deadline, and filing method.
How Solo 5500 Desk uses official Form 5500-EZ sources
The methodology page for source dates, hard stops, and Form 5500-EZ compliance boundaries.
Official sources for this guide
Last reviewed: .