Opentax
Install the OpenTax Claude marketplace plugin to walk through federal return preparation and audit a finished return against source documents.
Overview
opentax is a plugin marketplace for the Operate phase that provides open-source federal tax preparation and document-backed return review in Claude Code.
What is this marketplace?
- Open-source federal tax preparation plugin (opentax v1.0.3)
- Tax preparer flow guides you through filing steps
- Tax reviewer audits completed returns against source documents
- Single-plugin marketplace from Filed with Anthropic marketplace schema
- Dual mode: prepare returns and validate them before you file
- 1 plugin in marketplace (opentax v1.0.3)
- Publisher: Filed
- Two documented capabilities: tax preparer and tax reviewer
Community signal: 18 GitHub stars.
What problem does it solve?
Solo founders dread refiling errors and juggling preparer software while their source docs and return line items stay out of sync.
Who is it for?
US solo builders using Claude Code who want open-source, agent-guided federal prep plus an audit step before filing.
Skip if: Developers looking for coding skills, non-US tax regimes, or guaranteed professional tax advice without human review.
What do I get? / Deliverables
After installing opentax, you can complete a guided federal prep flow and run a reviewer pass that flags mismatches against your documents.
- Guided federal tax preparation session via the preparer
- Reviewer audit comparing a completed return to source documents
- Structured agent workflow for opentax v1.0.3
Plugins in this marketplace
1 plugin — install individually after you add the marketplace.
Recommended Marketplaces
Journey fit
Annual tax filing and compliance checks are ongoing personal/business operations for solo founders, not product coding—Operate is the honest primary shelf. iterate covers recurring lifecycle chores you refine yearly—filing, reviewing, and correcting returns before submission.
How it compares
Specialized tax prep/review marketplace plugin, not a SaaS billing skill or general document MCP.
Common Questions / FAQ
Who is Opentax for?
Opentax is for indie operators and solo founders who file US federal taxes and want Claude Code–hosted preparation and document review tooling from Filed.
When should I use Opentax?
Use it during tax season when you are assembling a federal return and want a guided preparer plus a reviewer pass against source documents.
How do I add Opentax to my agent?
Install the Opentax plugin from the Filed Claude marketplace entry and follow the preparer and reviewer flows inside Claude Code.