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Accounting Firm

Estudio Contable OYSS

Argentine accounting firm advising small and mid-sized entrepreneurs on tax, accounting, labour, company and audit matters

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About Estudio Contable OYSS

Small and medium-sized entrepreneurs are the firm's main focus at Estudio Contable OYSS, an Argentine accounting practice that plans its tasks around each client's needs. The partners, all public accountants, meet clients regularly to review how a service is progressing and how the business is developing.

Tax planning and compliance

The tax work begins with planning: analysing which tax treatment is most suitable for a client, and sending regular updates on changes to tax rules. It then covers national, provincial and municipal tax returns, replies to tax authority notices and claims, and support during inspections and disputes.

Accounting records and internal controls

Accounting services include designing the chart of accounts and the accounting circuits a business uses, reviewing entries and balances, reconciling bank accounts, and recording monthly and annual journal entries. The firm helps prepare the annual balance sheet and reports regularly on changes that affect the accounts.

Audit, control and process reviews

Audit work covers reviews of financial statements, reports and certifications prepared for specific purposes, and checks on regulatory or contractual compliance. The firm also assesses internal control systems, carries out operational and process audits, and designs internal audit units for clients that need one.

Labour, payroll and company law

The labour section handles salary and wage settlement with the related social charges, the registration of the payroll book, and the response to inspections. On company law, OYSS helps with reforms, dissolutions, mergers, transfers and splits, and it prepares meetings, shareholder assemblies and the minutes that record them.

An interdisciplinary network and public standing

Clients can draw on financial, marketing, advertising and human resources specialists from other disciplines, who work with the accountants on solutions. The partners present at congresses, sit on study committees and teach at universities, and they run courses and publish articles in specialist journals. The firm's own approach is personal and comprehensive.

TrustList summary

Estudio Contable OYSS is the short name of the firm Ottonello, Yunger, Sánchez Settembrini & Asoc. It specialises in small and medium-sized entrepreneurs and plans its work around each client's needs.

Products and services

  • Tax advice: planning and compliance.
  • Accounting: regular financial record keeping and reporting.
  • Labour and company law matters: employment and corporate obligations.
  • Audit and consulting: reviews and advisory projects.
  • Interdisciplinary network: financial, marketing, advertising and human resources support from other professionals.

Who it serves

Small and medium-sized entrepreneurs. The partners hold regular meetings with clients to review progress and how the business is developing.

Key facts

  • Partners: Hebe Ottonello, Hernán Yunger and Ariel Sánchez Settembrini, all public accountants (UBA)
  • Based in: Argentina

Summary written by TrustList from the business's own published information, Nov 2026.

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