Claude Code Skills·Claude Skills·The open SKILL.md registry for Claude
ClaudSkills / Security / security-misc

E Filing

Category: Security  ·  Sub-category: security-misc  ·  Last updated:
Contains verified MeF rejection code resolution procedures (R0000-901 through R0000-905-01 with 10-day perfection-period workflows), EFIN application and annual renewal checklists, and Form 8879-CORP e-signature retention rules. C-corp electronic filing, IRS MeF XML schema validation, acknowledgment tracking (A/R/D/P ack types), mandatory e-file threshold (10-return aggregation per T.D. 9972), provider type selection (ERO vs transmitter), advertising standards, and sanction tiers. Consult when e-filing 1120 returns, diagnosing MeF rejection codes, managing EFIN credentials or renewal, preparing Form 8879-CORP for e-signature, determining mandatory e-file applicability, onboarding a firm as an authorized e-file provider, or resolving e-file provider compliance issues.

From the source SKILL.md

Operational skill for electronic filing of C-corporation tax returns through the IRS Modernized e-File (MeF) system. Synthesized from MeF transmission specifications and EFIN provider authorization requirements.

What this skill does

E Filing is a community-contributed Claude Code skill in the security-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/e-filing/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The E Filing Claude Code skill is built for security engineers, penetration testers, DevSecOps practitioners, and development teams hardening codebases and infrastructure. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 116,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/e-filing
curl -L https://claudskills.com/skills/e-filing/SKILL.md \
  -o ~/.claude/skills/e-filing/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/e-filing/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/e-filing/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\e-filing\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Telegram

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the E Filing Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/e-filing/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.
What does the E Filing skill do?
Contains verified MeF rejection code resolution procedures (R0000-901 through R0000-905-01 with 10-day perfection-period workflows), EFIN application and annual renewal checklists, and Form 8879-CORP e-signature retention rules. C-corp electronic filing, IRS MeF XML schema validation, acknowledgment tracking (A/R/D/P ack types), mandatory e-file threshold (10-return aggregation per T.D. 9972), provider type selection (ERO vs transmitter), advertising standards, and sanction tiers. Consult when e-filing 1120 returns, diagnosing MeF rejection codes, managing EFIN credentials or renewal, preparing Form 8879-CORP for e-signature, determining mandatory e-file applicability, onboarding a firm as an authorized e-file provider, or resolving e-file provider compliance issues.
Is this skill free to install?
Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.
When should I use the E Filing skill?
Use E Filing when your Claude Code task falls under the Security category — specifically in the security misc area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use E Filing" or describe the task and let Claude pick). Browse related skills at /category/security/.
What is a Claude Code skill and how does the E Filing skill fit in?
A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. E Filing is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Security category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA
AeyeOps. (2026). E Filing [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/e-filing/
BibTeX
@misc{e-filing-2026,
  author    = {AeyeOps},
  title     = {E Filing [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/e-filing/}
}

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