- Models, picked per task by Protas Auto
- 4
- Named agents across the tax cycle
- 8
- Regional blocs in scope: ECOWAS, EAC and SADC
- 3
- Of tool calls on the audit trail
- 100%
Why Protas
Most of a tax team’s week goes on work that has to be done but doesn’t need their judgement: pulling ledgers, matching lines, drafting the same schedules again. Protas takes that work on, runs each step with the model best suited to it, and brings your people in exactly where judgement is needed, with the evidence already laid out.
Tools
Hundreds of tools, grouped by the work they do.
- Ledgers and ERPsRead entries, balances and journals from the systems you already use.
- ReconciliationMatch ledgers to bank, returns and sub-ledgers, and explain every difference.
- Returns and schedulesDraft VAT, PAYE, WHT and CIT returns with their working papers.
- Filing and paymentsPrepare filings and payments for a named person to approve.
- Documents and evidenceFind the invoice, contract or receipt behind any figure.
- Rules and researchCheck a position against the rules for that jurisdiction, and cite them.
- CustomsCheck HS codes, customs values and import documents shipment by shipment.
- Transfer pricingRun benchmarks and keep master and local files current.
How it works
Protas works like a tax team that never sleeps: it plans, drafts, reconciles and checks, then hands every decision back to your people.
Describe the task the way you would to a colleague: draft a return, reconcile a ledger, check a filing. Protas plans the steps and shows you the plan.
Specialist agents for VAT, payroll, withholding and corporate tax run each step inside your entities, on the model best suited to it.
Protas shows its working, flags anything it is unsure of and waits for your approval before anything leaves the building.
Each figure, and each rule Protas relied on, links back to its source, so a review or an audit takes minutes instead of days.
Same permissions
An agent can do what the person it works for can do, and nothing more.
| Action | Your team | Protas agent |
|---|---|---|
| Read ledgers and documents in scope | Yes | Same scope |
| Prepare a return or reconciliation | Yes | Yes |
| Review and flag issues | Yes | Flags them for a person |
| Approve a return | By role | Never |
| File or pay | By role, after approval | Only after a named approval |
| Change rules, roles or permissions | Admins | Never |
| Leave an audit trail | Yes | Every tool call |
Agents
One agent for each outcome: monthly returns (VAT Filer), corporate tax (CIT Analyst), customs taxes (Imports Monitor), transfer pricing (TP Analyst), audited accounts (Accounts, soon) and tax audit (Audit Analyst).
Each outcome has a Protas agent that does the work inside TaxOS. Reconciliation agents work across all of them.
Evidence
How Protas stays accountable.
- 4 + AutoClaude and GPT models, or Protas Auto picks one per task
- TracedEvery figure links to the entry or document behind it
- ApprovedNothing is filed or paid without a named person
- ScopedAgents see only what their person can see
FAQ
Questions about Protas.
What is Protas?
Protas is Setoff’s set of AI tax agents. They use hundreds of tools to do the same tasks your team does in TaxOS: pull ledgers, reconcile, draft returns and check filings.
Does Protas replace our tax team?
No. Protas takes on the preparation work and brings your people in where judgement is needed. Approvals, filing and payments stay with named people.
What can an agent see?
Only what the person it works for is scoped to in TaxOS: the same entities, jurisdictions and periods.
Which models does Protas use?
Claude Opus 5.5, Claude Fable 5.1, GPT-6 Astra and GPT-6.1 Sol. Protas Auto picks the model best suited to each task.
Do we need TaxOS to use Protas?
Yes. TaxOS is the harness Protas works through: its rules, permissions and audit trail apply to every agent.