Facing a state tax audit? North Carolina NCDOR and DES audits and New York and California residency audits

Two North Carolina agencies audit small businesses. The Department of Revenue handles sales and use tax, income tax withholding (NC-5), individual income tax, corporate income tax and franchise tax. The Division of Employment Security handles unemployment insurance tax (NCUI 101), with a focus on wages and worker classification. Their audits, assessments and appeals are separate, and DES taxes don't show up in your NCDOR account.

• How DES audits: DES says an audit usually covers one calendar year and can expand to up to five years if it finds problems. The auditor checks whether reported wages match what was actually paid, whether taxable wages were figured correctly, and how casual labor, contract labor, commissions, officer pay and payments to contractors were treated. It can take place at your business, your accountant's office, a local office or online.
• Employee or contractor? For unemployment insurance, North Carolina uses the common-law control test, not the ABC test some states use: who controls how the work is done, who bears profit and loss, and whether the relationship is ongoing. If DES decides someone you paid on a 1099 was an employee, you owe unemployment tax on those wages. For federal and North Carolina withholding classification, see our guide at yclcpa.com/payroll.
• DES results: the auditor discusses findings with you or your designee, then mails a results letter (NCUI-673) and an assessment. To disagree, protest in writing by the deadline in the letter. Interest keeps running during a protest, and amounts you paid are refunded if you win.

A sales tax audit looks in two directions. On sales, did you charge the right rate, and do you hold valid exemption certificates for exempt and resale sales? On purchases, did you pay sales tax on equipment, supplies and software you use yourself, or do you owe use tax? Auditors often test a sample period and project the error rate over the whole audit period, so mistakes in the sample get magnified.

• Exemption certificates: for resale, farm, manufacturing and other exempt sales, get a fully completed certificate at the time of sale (for example Form E-595E, the multistate Streamlined certificate). A seller that has a complete certificate at the time of sale (or within 90 days after) is generally relieved of liability; without one, the sale is treated as taxable. You keep the certificate; it isn't sent to the NCDOR.
• Use tax: items bought online from out of state, or from sellers that didn't charge North Carolina tax, for your own use (computers, kitchen equipment, supplies) are subject to use tax that you report on Form E-500. Restaurants and retailers miss this most often.
• Marketplace-collected tax: what Amazon, delivery apps and other marketplace facilitators collect and remit isn't owed again by the seller, but your direct sales outside the platform are. In an audit you need to tie platform reports to your E-500s (see our North Carolina sales tax guide at yclcpa.com/salestax).
• Agree on the sampling method early. At the start, confirm in writing the audit period, the sample period and how results will be projected. If the sample period includes a one-time large transaction, or the business changed mid-period, raise it so the error isn't unfairly multiplied.
• Records: North Carolina requires records complete enough to determine your tax, and the NCDOR can inspect them at reasonable times. If you can't show a sale was exempt, it's taxed.

Example (hypothetical numbers, to show the method): a North Carolina retail store has a 36-month audit period. The auditor tests 3 months of purchase invoices and finds $6,000 of equipment and supplies for the store's own use with no tax paid, out of $60,000 of total purchases in those months, a 10% error rate.

If $4,000 of that $6,000 was a one-time equipment purchase made only once in the whole audit period, it should be pulled out and assessed on its own rather than projected. The error rate then drops to about 3.3% and the projected amount shrinks a lot. Flag unusual items in the sample before the projection is done.

Quite possibly. New York and California focus on high earners who move away, people who sell a business or stock around the move, and remote workers. They want proof that the center of your life actually left on the date you say. The evidence has to hang together: day counts, homes, work, family, driver's license and voter registration, doctors, banks, memberships and where your most treasured belongings are.

Description: The two states' main tests on the left, common evidence on the right, and the assessment period in the last row.

Item	New York	California	Common evidence
Basic concept	Domicile: the place you intend as your permanent home and return to; a change needs clear and convincing evidence	Resident: in California for other than a temporary or transitory purpose, or domiciled in California and only temporarily away	Move timeline, purchase or lease of the new home
Day-count rule	Statutory resident: more than 183 days in New York and a permanent place of abode maintained there for substantially all of the year (generally more than 11 months); any part of a day in New York counts	More than 9 months in California creates a presumption of residency; a safe harbor applies for at least 546 consecutive days outside the state under an employment contract (with conditions)	Day-by-day location records: phone location, card charges, flights, building access logs, calendars
Main factors	Home, active business involvement, time, "near and dear" items, family	Closest connections: home, spouse and children, work, driver's license, voting, banks, doctors, memberships, income sources	Deeds and leases, children's schools, work location, bank and doctor addresses
Common risks	Keeping the New York home and returning often; a business still in New York; the "convenience of the employer" rule for remote work	Keeping the California home; spouse and children still there; selling stock or a business right around the move	Sale or rental documents for the old home; records of moving the business
Assessment period	Generally 3 years	Generally 4 years	Keep move-year records at least until the period closes

• State rules control. New York applies its tax law and Nonresident Audit Guidelines and California its FTB Publication 1031; the answer always depends on the facts.
• The move year matters most. You file part-year returns in both states (New York IT-203, California 540NR, and North Carolina D-400 with Schedule PN) and split income by the move date. Large income right around that date, such as stock sales, business distributions or bonuses, is what gets fought over.
• 183 days isn't the whole story. It's one test. New York's domicile test looks at the center of your life, so keeping the home, the family or the business there can keep your domicile in New York even under 183 days.
• Start collecting evidence before you move: new driver's license, plates and voter registration, the moving contract, primary bank, doctors and lawyers in the new state, school transfers, and moving the things you treasure (family photos, collections, valuables).
• Remote work: under New York's "convenience of the employer" rule, wages for a New York employer can still be New York-source if you work out of state for your own convenience rather than the employer's necessity. Look at this before you move.

When a state thinks an out-of-state business may have activity there (employees, inventory, sales), it sends a business activity questionnaire asking what you do in the state. Your answers decide whether you must register and how many years you owe, so work out the facts before answering. If the state hasn't contacted you yet, a voluntary disclosure agreement may be better: North Carolina generally looks back 3 years or 36 months, generally waives penalties and still charges interest.

• Answer carefully. Questionnaires typically ask about employees, agents, offices, inventory, in-state sales and where services are performed. Careless answers, or none, can lead the state to assume the worst. Go through each question with a CPA and make sure the answers match your returns and platform data.
• North Carolina VDA conditions (per the NCDOR): you haven't been contacted about the tax by the NCDOR, the IRS or the Multistate Tax Commission; you have no other outstanding liabilities; you're not under audit; you haven't used the program before; and you'll provide records on request. It isn't available for underreporting on returns already filed.
• Lookback: generally 3 years for annual taxes (the most recent past-due return plus the two before it) and 36 months for other taxes; longer for sales or withholding tax you collected but didn't remit; 6 years or 72 months for non-filers found through an examination.
• Penalties and interest: penalties are generally waived; where collected trust taxes weren't remitted, everything except the 5% failure-to-pay penalty is waived. Tax and interest are due within 60 days after the agreement is accepted.
• You can start anonymously. You or your representative can apply without naming you, then disclose once terms are set. The program mainly resolves nexus-driven sales and use tax and corporate income and franchise tax issues.
• Other states have similar programs with different lookbacks and penalty relief. If several states are involved, decide the order together.

Generally 3 years from the later of the due date or the filing date. There's no limit if no return was filed, the return was fraudulent or you tried to evade the tax. It's 10 years for sales or withholding tax collected but never remitted. If you report a federal change on time, North Carolina can assess within 1 year after your report or the original period, whichever is later; if you don't, it has 3 years from receiving the final federal report.

• Penalties: the NCDOR says unintentional errors can draw a penalty of 10% or 25% of the deficiency, and fraud 50%. Late filing and late payment penalties are separate.
• Interest: 7% a year for July 1 through December 31, 2026, running from the original due date.

North Carolina uses its own Form GEN-58, Power of Attorney and Declaration of Representative; the IRS Form 2848 doesn't work there. A CPA, attorney or other representative can then deal with the NCDOR, see your information and attend review conferences. GEN-58 can be signed online through DocuSign, or printed, signed and uploaded, mailed or faxed.

• Fill in everything: taxpayer name, SSN or EIN, representative name, tax type, periods, date and both signatures. Missing items get the form returned, and the representative's Part 2 declaration must be signed and dated.
• Periods: you can cover periods that have ended and future periods ending within 3 years from December 31 of the year you file it.
• Notice copies: the NCDOR now emails copies of notices to representatives listed with an email address on GEN-58 when the authorization box is checked.
• DES and other states need their own forms. A DES unemployment audit and New York or California audits each require that agency's authorization (New York uses Form POA-1, for example).

There are four stages. Within 45 days after a proposed assessment, request Departmental review on Form NC-242. If review doesn't resolve it, the NCDOR issues a Notice of Final Determination. Within 60 days after that, you can file a contested tax case with the Office of Administrative Hearings, generally without paying first. To challenge OAH's final decision, petition Wake County Superior Court, generally within 30 days, and pay the tax, penalties and interest first.

Description: Read top to bottom in time order; each row shows what happens, what you do and the deadline.

Step	What happens	What you do	Deadline
1. Audit results	The auditor discusses adjustments and issues a Notice of Proposed Assessment or a proposed refund denial	Check every item; supply missing evidence now if you can	Per the notice
2. Request Departmental review	File a written objection on Form NC-242	State what you disagree with and why, attach evidence; you can name a representative	45 days after the notice was mailed or hand-delivered
3. Departmental review	The NCDOR may cancel, adjust, request more information (allowing at least 30 days) or schedule a conference	Conferences can be in person, by phone or online; informal, no sworn testimony; most disputes end here	Per the NCDOR's notice
4. Notice of Final Determination	The NCDOR explains why it upheld its position, what's owed and how to contest	Decide whether to pay, set up a plan or go to OAH	—
5. OAH contested tax case	File a Contested Case Petition with the Office of Administrative Hearings and serve the NCDOR's process agent	Generally no need to pay first; usually handled by an attorney	60 days after the notice was mailed
6. Judicial review	Petition Wake County Superior Court under the mandatory business case procedures	Pay the tax, penalties and interest first; handled by an attorney	Generally 30 days after the OAH final decision

• After 45 days, it's final. If you don't request review in time, the proposed assessment becomes final with no further administrative or judicial review. Write the date down first.
• Information requests: if you don't respond, the NCDOR asks again; if you still don't, it sends a Notice of Inaction, and if you don't reply within 10 days the action becomes final.
• What can't be reviewed: unpaid tax shown on your own return and refunds offset against other debts. A refund denied as untimely goes straight to OAH.
• DES appeals are separate: protest in writing using the method and deadline in the NCUI-673 results letter and the assessment.

You have to report it yourself. If an IRS audit, a CP2000 adjustment or your own amended federal return changes your North Carolina tax, report it within 6 months: individuals file Form D-400 marked as amended with Schedule AM and the federal audit report, and businesses use their own returns. If you don't, North Carolina's assessment period stays open longer, penalties can apply and related refunds can be forfeited.

• North Carolina will find out. The IRS shares audit results with state revenue departments under information-sharing agreements.
• When the 6 months starts: from the date you're notified of the federal change or final determination; for your own amended federal return, from when you file it.
• Report it even if it means a refund. A federal change that lowers your North Carolina tax can be claimed as a refund, but only within the time limits.
• Other states have similar rules, with deadlines that commonly range from 90 days to a year. Check every state you lived in or had income from. For the federal audit process, see our guide at yclcpa.com/audit.

Start with which agency, which tax and the deadline on the letter, then find your situation below.

• Situation A: an NCDOR sales tax audit notice. Sign GEN-58 with a representative, confirm the audit period, sample period and projection method, and pull together E-500s, POS and platform reports, exemption certificates and purchase invoices. Check use tax on your own purchases first.
• Situation B: an NCDOR proposed assessment. Note the 45th day and check every item. To disagree, file Form NC-242 with evidence. You can pay the parts you agree with to cut interest.
• Situation C: a DES unemployment audit. Gather payroll records, W-2s, 1099s, contracts and invoices, and assess every 1099 worker under the control test. Review federal and North Carolina withholding at the same time.
• Situation D: New York or California is questioning your residency. Build the move timeline and day-by-day location records, and collect evidence on your home, work, family, license, voting, banks and doctors. Review the move-year part-year returns too.
• Situation E: an out-of-state nexus questionnaire, or you realize you should have registered. Don't rush the answers. Work out your sales, inventory and people in each state, and if no one has contacted you yet, consider a voluntary disclosure.
• Situation F: an IRS audit or CP2000 changed your federal return. Report it to North Carolina (and any other affected state) within 6 months, and claim any resulting refund in time.