Field guidesVisual labCalculatorsTax lawResearchTaxpayer rightsAbout
The official toolbox · 32 destinations

The right tool. The official source.

Check a refund. Retrieve records. Make a payment. Find help. A practical directory of federal and California taxpayer tools, with access requirements explained before you leave.

Search by task, agency, form, or tool name. Enter no personal or financial details. This directory search runs in your browser.
Public: no account needed to read or estimateVerification: the agency asks for identifying detailsAccount: sign in on the agency’s site
IRSVerification required

Where’s My Refund?

Check an individual federal income-tax refund. An amended-return refund is a separate inquiry.

Before you open it

Have your SSN or ITIN, filing status, and exact refund amount ready. Enter them only on the official IRS service.

IRSVerification required

Where’s My Amended Return?

Track an eligible Form 1040-X. The IRS page explains when status appears and which returns the tool cannot track.

Before you open it

The guest lookup asks for SSN, date of birth, and ZIP code. An IRS Online Account is another access option.

IRS

Individual Online Account

View balances, payments, available notices and records; access payment-plan and authorization functions.

Before you open it

Sign in through the IRS landing page. New users may need photo identification for identity verification.

IRSAccess varies

Tax records & transcripts

Find return, account, wage-and-income, and non-filing records. A transcript is not a full photocopy of the filed return.

Before you open it

Online downloads require an IRS account. The official page also explains mailed transcript options and availability.

IRSVerification required

Direct Pay from a bank account

Make a federal tax payment from a bank account without registering for an account. Select the correct tax form, reason, and period.

Before you open it

Review supported payment types and verification requirements. Keep the payment confirmation; Syso.tax does not process the payment.

IRS

Online payment agreement

Review eligibility and apply for an available short-term or installment payment arrangement. Fees and ongoing interest depend on the arrangement.

Before you open it

The online application requires an IRS Online Account. Review current balance, filing compliance, bank-debit information, and official terms.

IRSPublic resource

Offer in Compromise pre-qualifier

Use the IRS’s preliminary eligibility and offer tool from its OIC guidance page. An estimate is not acceptance of an offer.

Before you open it

Have income, expense, asset and tax-debt figures ready for the official tool. Review filing and payment prerequisites before applying.

IRSPublic resource

Tax Withholding Estimator

Estimate federal income-tax withholding and explore Form W-4 changes. This is a federal withholding tool, not a California calculation.

Before you open it

Gather recent pay statements, a recent return, other income, deductions, and credits. Check the supported tax year and tool limitations.

IRSPublic resource

Interactive Tax Assistant

Follow a topic-specific interview about filing, income, deductions, credits, or other federal tax questions.

Before you open it

Choose the correct year and topic. Read the interview’s assumptions; its answer depends on the facts you enter.

IRSPublic resource

EITC Assistant

Explore the federal Earned Income Tax Credit, qualifying-child questions, filing status, and an estimated credit.

Before you open it

Have income documents and relevant adjustments ready. Select the appropriate year; the IRS assistant does not request your name or SSN.

IRSPublic resource

Sales Tax Deduction Calculator

Estimate optional state and local general sales tax for itemized deductions. Confirm the tool’s year and current Schedule A rules.

Before you open it

Have income, filing status, dependents, locations and dates lived, and specified large-purchase receipts ready.

IRSAccess variesSeasonal availability

IRS Free File options

Compare guided partner software and Free File Fillable Forms through the official IRS entry point. Eligibility and state-return terms differ.

Before you open it

Availability is seasonal. At this review, the IRS page said Free File was closed until January 2027. Check the official page before starting; partner accounts may be required.

IRSPublic resource

VITA / TCE free tax-help locator

Find volunteer basic return-preparation programs, including services focused on qualifying taxpayers, limited-English speakers, and older adults.

Before you open it

Use the locator linked from the official program page. Confirm each site’s eligibility, appointments, available return types, and what to bring.

IRSPublic resource

Forms & instructions search

Locate official forms, instructions, publications and prior-year products. A current form can be wrong for a prior-year return.

Before you open it

Search by form number and confirm the revision or tax year before downloading or completing it.

IRSSeasonal availability

Get an Identity Protection PIN

Review enrollment and retrieval options for the IRS’s six-digit filing-protection PIN. Online access requires identity verification.

Before you open it

The reviewed IRS page announces an online outage from November 16, 2026 until mid-January 2027. Check current availability and alternative enrollment methods.

IRS

Identity & tax-return verification

Use the official online return-verification service only when the IRS notice permits it. The current page covers the CP5071 series and Letter 5447C.

Before you open it

Have the notice and requested return available. Other letters, including 4883C, can require a different verification method.

IRSVerification required

IRS Document Upload Tool

Find the official service for responding to supported IRS letters and notices. It is not a tax-return filing service.

Before you open it

Read the notice instructions and use the exact notice type or access code. Upload only through the IRS destination, never through this directory.

IRSPublic resource

Official notice & letter lookup

Search the IRS explanation of a CP or letter number and follow its current instructions.

Before you open it

Use the exact identifier from the letter. Keep its tax period, explanation, response destination, and deadline in view.

IRSPublic resource

Disaster tax-relief lookup

Find IRS disaster announcements by state and date. Each announcement defines affected taxpayers, covered obligations, and relief periods.

Before you open it

Check the exact locality, event, covered dates and obligations. Federal relief does not automatically establish California treatment.

IRSPublic resource

Taxpayer Assistance Center locator

Locate an IRS office for issues that require in-person assistance. Check the service and appointment instructions before visiting.

Before you open it

Choose the office and review current hours, services, appointment requirements and identification instructions on the official site.

TAS / IRSPublic resource

Low Income Taxpayer Clinic finder

Find independent clinics providing free or low-cost help with qualifying IRS disputes and taxpayer-rights education for people using English as a second language.

Before you open it

Check income, dispute, language and service requirements with the clinic. LITC representation is different from routine return-preparation assistance.

TASPublic resource

Can the Taxpayer Advocate Service help?

Use the TAS qualifier and current acceptance guidance for hardship, unresolved IRS-system problems, or fair-treatment concerns.

Before you open it

A preliminary result is not a final case-acceptance decision. Read current restrictions and the official request-for-assistance instructions.

California FTB

MyFTB account

Access California tax-account information, payment history and available online services through the Franchise Tax Board.

Before you open it

Create or sign in to your MyFTB account using the official registration instructions. Some services require additional verification.

California FTBVerification required

California refund status

Check a California income-tax refund using the FTB’s official lookup rather than the federal IRS tracker.

Before you open it

The FTB page lists SSN, ZIP code, exact refund amount and the numeric part of the mailing address as required lookup information.

California FTBVerification required

California Web Pay

Pay California tax from a checking or savings account. Personal and business payment routes are separate.

Before you open it

Confirm taxpayer type, payment purpose and tax year. MyFTB provides added payment-management features, but the page also links guest payment routes.

California FTBPublic resource

CalEITC cash-back estimator

Explore the FTB’s California earned-income and related cash-back credit estimator. Its reviewed version asks about tax year 2025.

Before you open it

Have earnings, other income, investment income, filing status, age and qualifying-child information ready. Check the displayed tax year before using it.

California FTBPublic resource

California tax calculator, tables & rates

Find FTB tax tables and rate schedules. The reviewed calculator supports 2025 only and excludes Form 540 2EZ.

Before you open it

Choose the correct tax year, return type, filing status and taxable-income figure; a tax-table calculation is not a full return.

California FTBPublic resource

California estimated-tax guide

Find California installment rules, worksheets and payment links. California’s installment pattern differs from the usual federal pattern.

Before you open it

Check the current Form 540-ES instructions and any exceptions or disaster relief. MyFTB can show estimated payments already received.

California FTB

CalFile: direct California filing

Review the FTB’s free direct e-filing service and eligibility requirements. It files a state return, not a federal return.

Before you open it

A MyFTB account is required. Check supported years, eligible situations and registration requirements before preparing the return.

California FTBAccess varies

California payment-plan application guide

Review personal and business installment-agreement requirements and online, telephone or mail application routes.

Before you open it

Check eligibility, balance, filing history and any existing collection action. Applying does not guarantee approval or stop all continuing charges.

Social Security Administration

my Social Security

Review earnings history, Social Security statements and personalized benefit estimates; access available benefit and tax-form services.

Before you open it

Create or use your personal SSA account through its official sign-in instructions. Earnings corrections and benefits have separate procedures.

U.S. Tax CourtAccess varies

DAWSON: court cases & electronic filing

Access the Tax Court’s case-management system. Public case information and account-based case filing serve different tasks.

Before you open it

Read the Court’s petitioner guidance before filing. Account access, filing a petition and checking a case do not extend a statutory deadline.

Read the official access / filing guidance ↗

01

Choose the jurisdiction

Federal and California accounts, refunds and payments are separate. A result in one system does not establish the result in the other.

02

Check the year and scope

A tax-table tool, credit estimator, and full filing application do different jobs. Read the supported year and excluded situations before relying on a result.

03

Use the official destination

Follow the agency’s entry page to any authorized sign-in provider or filing partner. Read its privacy and access instructions before entering sensitive information.

Independent educational directory. No endorsement or government affiliation. Links and access descriptions reviewed November 15, 2026. Russian descriptions explain English-language sources.

What are you researching?

Search the learning notes, reference library, FAQs and calculators.