PHOENIX, ARIZONA
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Tax preparation · Planning · Accounting

Tax expertise.
Personal service.
A clearer path.

Your finances deserve personal attention. We help individuals, families, and business owners prepare their taxes, keep their books organized, and plan ahead—with clear explanations at every step.

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●English & Spanish · Phoenix, Arizona
GROUNDED IN ARIZONAFOCUSED ON YOU ↗
EAEnrolled Agent expertise
+Tax planning & accounting together
↔Service in English & Spanish
Our services

The right support.
For your next step.

Explore tax preparation, business accounting, and international reporting. Each service page explains the work, the records to gather, and how to begin.

Tax preparation & planning

Advanced Tax Planning

Make your next financial decision with the tax picture in view. We help you compare choices, anticipate tax obligations, and turn planning conversations into practical next steps.

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Federal & State Tax Returns

Careful preparation starts with understanding the records behind the return. We prepare individual and business income tax returns and explain the information that affects your filing.

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Amended Returns & Refund Claims

Found missing information or a possible error in a filed return? We review the original filing and the supporting records to determine what correction may be appropriate.

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IRS & State Audit Representation

A tax examination deserves an organized response. We help you understand the request, gather relevant records, and address the matter with professional representation.

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ITIN Applications — Form W-7

Get help understanding the paperwork for an Individual Taxpayer Identification Number. We assist with Form W-7 preparation and identifying the supporting documents relevant to your application.

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Tax Filing Extensions

If your records are not ready, plan your next steps before the filing deadline. We help with extension requests and review the information available to estimate a potential payment.

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Business support

Payroll Services & Coordination

Keep payroll connected with your business records. We help coordinate payroll information, accounting entries, and support for your ADP payroll arrangement.

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Business Accounting & Advisory

Your business needs more than a year-end total. We bring bookkeeping, financial reporting, business tax preparation, and planning into a coordinated view of your operations.

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International reporting

Foreign Account Reporting — FBAR

Foreign financial accounts can create reporting responsibilities beyond an income tax return. We help review your situation and prepare an FBAR when a filing is required.

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Foreign Asset Reporting — Form 8938 / FATCA

Understand how foreign financial assets fit into your U.S. tax reporting. We assist with reviewing potential Form 8938 requirements and preparing the form when applicable.

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Nonresident Tax Returns — Form 1040-NR

U.S. income and international circumstances require a careful look at filing status and reporting obligations. We help nonresident taxpayers evaluate their situation and prepare the appropriate return.

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Why One Plus

Expertise you can understand.
Attention you can feel.

You deserve a clear explanation of your numbers and a service relationship built around the questions that matter to you.

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Knowledge behind the advice

Our founder, Rafael Carmona, is an Enrolled Agent and Certified Tax Planner. That tax focus shapes the way we approach preparation, planning, and representation.

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Your situation comes first

A family tax return and an operating business raise different questions. We start by understanding your circumstances and the scope of help you need.

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Clear, practical communication

We explain the information needed, the work involved, and the next steps in everyday language. Speak with us in English or Spanish.

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A connected view of your finances

Your books, payroll records, business returns, and personal tax picture are connected. We help bring those pieces into the same conversation.

Rafael Carmona

Enrolled Agent · Certified Tax Planner

About One Plus Tax & Accounting Inc

Professional expertise.
A relationship built on understanding.

One Plus Tax & Accounting Inc is a Phoenix-based tax and accounting firm founded by Rafael Carmona, EA. We work with individuals, families, and business owners who want organized records, thoughtful tax preparation, and a clearer understanding of their financial decisions.

Our purpose is to make tax and accounting matters easier to understand and manage. We bring preparation, planning, bookkeeping, and business reporting into the same conversation, with practical explanations and attention to your circumstances.

CARE IN THE DETAILSCLEAR COMMUNICATIONENGLISH & SPANISH
When life changes

New chapter?
Let’s revisit your tax picture.

A change at home or in your business is a good reason to review your tax plan. Talk with us about what has changed and what to consider next.

Marriage & family

Review filing choices, dependents, and withholding as your household changes.

A new job or bonus

Consider how a change in earnings fits into your overall tax picture.

Business changes

Discuss income shifts, major purchases, or plans for a new business.

Planning for retirement

Look ahead at the tax considerations of changing income sources.

A straightforward approach

Good advice starts with listening.

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Tell us what matters

Tell us about your situation, the questions you need answered, and what you want to accomplish. We’ll discuss the services that fit your needs.

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Understand your situation

We clarify the scope of work and the records needed, then review the relevant details with you. Our office will explain how to provide documents securely.

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Move forward with clarity

Understand the work completed, the questions that remain, and the next steps. We aim to make tax and accounting decisions easier to understand.

Frequently asked questions

Know what to expect.
Ask with confidence.

A few practical answers before we begin. For questions about your own situation, contact our office.

What types of clients do you work with?

We work with individuals, families, sole proprietors, partnerships, S corporations, and corporations. Services can include tax preparation, tax planning, accounting, and representation. Contact us about your specific needs and current availability.

What business services are available?

Our business services include tax preparation, tax planning, bookkeeping, account reconciliations, financial reporting, payroll coordination, and Arizona TPT support. The scope of work is based on your needs and the services agreed with our office.

What should I gather for tax preparation?

Start with your most recent tax return, income documents such as W-2s and 1099s, relevant deduction records, and any tax notices. Business owners should also have current bookkeeping reports and information about significant purchases or changes. We will identify the documents relevant to your situation.

Can you help organize or catch up my bookkeeping?

We can discuss the condition of your books, the periods involved, and the records available. That review helps determine the cleanup, reconciliation, and reporting work needed before ongoing services or tax preparation can move forward.

How do payroll services fit with accounting?

We help coordinate payroll information with your bookkeeping and business reporting. Ask our office about payroll support, the provider involved, and which processing and filing responsibilities apply to your arrangement.

Can you help with an IRS or state tax notice?

Yes. Contact our office and provide a complete copy of the notice through the client portal as instructed. Include all pages and tell us when you received it. We can review the issue and discuss the assistance or representation needed.

How long will the work take, and what will it cost?

Timing and fees depend on the complexity of the work, the condition of your records, and the information still needed. Contact our office to discuss the scope, fee, and expected schedule for your engagement.

How do I share documents with your office?

Use the Client Portal (Canopy) link on this website to sign in. Follow the instructions from our office for submitting documents or requesting access to your account.

How do I request an appointment or pay an invoice?

Select Appointments to open our Calendly appointment request page. Select Pay Invoice to open our CPACharge payment page. Both links are available at the top of this website and in Client Resources.

Can I receive service in Spanish?

Yes. We offer service in English and Spanish. Let our office know which language you prefer when you contact us.

For our clients

Your office essentials.
Just a click away.

Access your client portal, request an appointment, or pay an invoice through the links below. Each opens in a new tab.

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Appointments

Request a time to discuss your tax and accounting needs through our Calendly page.

Request appointment
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Pay Invoice

Use our CPACharge payment page to pay your invoice.

Pay invoice
Let’s connect

Your next chapter
starts with a conversation.

Preparing a return, reviewing your books, or facing a tax question? Call our office to discuss your needs and current availability.

Call our office
(602) 249-9160
One Plus Tax & Accounting Inc
1747 E Morten Ave, Ste 306
Phoenix, AZ 85020

Fax: (602) 249-9815

Email: info@oneplustax.com

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