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.
Summary
A Form 5500-EZ sponsor required to file 10 or more IRS returns in the calendar year must file electronically through EFAST2 (rule effective January 1, 2024). The 10-count aggregates W-2, 1099-NEC, 1099-MISC, 941, 940, 720, 1040, and the 5500-EZ itself. Example: a freelancer who issues 8 form 1099-NEC + 1 W-2 + 1 form 5500-EZ already crosses the threshold and cannot paper-file. Solo 5500 Desk never asks for Login.gov, EFAST2 PIN, or trust credentials.
Mandatory e-filing threshold: 10 or more IRS returns per calendar year.
| Threshold | 10 IRS returnsAggregate all return types the sponsor is required to file. |
|---|---|
| System | EFAST2DOL electronic filing system for Form 5500-series returns. |
| Credential boundary | User-controlledThe signer uses official credentials directly. |
The 10-return threshold
The electronic filing rule looks at how many IRS returns the sponsor is required to file during the calendar year. A small business can cross the threshold because of payroll, contractors, income tax, employment tax, excise tax, or other return obligations even if the retirement plan itself is simple.
Credentials belong to the signer
EFAST2 access is tied to official user credentials. A self-preparation packet should never ask for Login.gov passwords, EFAST2 PINs, portal security answers, trust account credentials, or brokerage credentials. Keep those outside the product.
Packet-only means no transmission
Solo 5500 Desk can organize the filing facts and warn that electronic filing may be required. It does not submit the return, represent the sponsor, confirm acceptance, or monitor official notices after filing.
Common questions
When is EFAST2 required for Form 5500-EZ?
EFAST2 electronic filing is generally required when the plan sponsor is required to file 10 or more IRS returns of any type in the relevant calendar year. The count includes W-2, 1099, income tax, employment tax, excise tax, and Form 5500-EZ returns.
Can I still file Form 5500-EZ on paper?
Paper filing is a possible path only when the sponsor is below the mandatory e-filing threshold and the official instructions still allow paper for the case. The packet should preserve the threshold check.
What is EFAST2?
EFAST2 is the Department of Labor electronic filing system for Form 5500-series returns. Filers use official credentials and the official system, not this product's storage.
Does Solo 5500 Desk transmit to EFAST2?
No. The MVP is packet-only. It prepares answers and instructions but does not act as an approved transmitter or file the return on the user's behalf.
Related guides
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.
Form 5500-EZ 10-return electronic filing threshold
A narrow guide for Solo 401(k) sponsors checking whether the IRS 10-return e-filing threshold changes their Form 5500-EZ 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
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