An IRS CP148 notice shows an unexpected business address change: verify the source

A CP148A or CP148B notice can arrive even when the finance team does not remember requesting a new mailing address. Preserve the notice and compare the old and new address information with the company’s intended tax-mail destination. The immediate task is to establish whether the change is correct and what caused it, rather than assuming either that the notice is harmless or that someone acted fraudulently.

The IRS explains that these notices confirm an employment-tax-related address change, with CP148A sent to the new address and CP148B to the former address. Its guidance identifies an employment tax return, Form 8822-B and address variations as possible triggers. Even a change in how an address is written can therefore deserve a different explanation from a move to an unfamiliar location.

Record the notice date, legal entity, address information and who received it. Keep sensitive identifiers in the approved tax file. If the company has several entities or locations, do not assume the notice applies to the whole group. A correction for one taxpayer should be traced to that taxpayer’s records and authorized people.

Collect the relevant recently filed employment tax return and any address-change submission. Compare their address fields with the notice. Ask the payroll provider or preparer which company profile supplied those fields and when it was last changed. The address visible in today’s portal may differ from the value used when the return was prepared.

For a fictional example, a business keeps its tax mail at an approved office but asks a payroll provider to update a separate contact record. A later return carries a different mailing address. That sequence does not prove how the error occurred. The useful investigation follows the actual return copy, submitted change and provider configuration to determine which value reached the IRS.

Retain the submitted version and its filing evidence rather than asking the provider to replace it silently with a corrected screen image. If an address abbreviation is the only difference, record that finding. If the destination changed materially, identify who approved it and whether the location can receive the company’s official correspondence reliably.

Identify the company person responsible for receiving, logging and assigning tax correspondence. Confirm the intended address with that person and the authorized tax contact. A provider’s address, registered-agent office and operating location serve different roles; none should become the tax-mail destination merely because it is the most convenient value available in a software field.

Check any service agreement governing mail receipt and forwarding. Determine which company entity the service covers and what happens when an item arrives. The business needs an actual route from physical receipt to a responsible reviewer. An address that accepts envelopes but has no assigned escalation process can still leave important correspondence unattended.

Where the new address is unfamiliar or cannot be explained by the filing record, involve the company’s authorized tax and security contacts. Preserve the evidence and use verified IRS contact channels for follow-up. Do not send sensitive records or credentials to an unexpected contact merely because that person appears in a message about the address change.

The IRS CP148 guidance says no action is needed if the change is correct. If it is incorrect, it directs the taxpayer to return the notice with a completed Form 8822-B. Have the authorized owner or representative review the actual notice and current form instructions, including the required signature and destination, before preparing the response.

The IRS address-change FAQ states that an authorized representative submitting a form or written statement must attach the relevant power of attorney or Form 2848. A service provider’s operational access does not itself establish that it can change the taxpayer’s address. Confirm who will sign or represent the company rather than leaving the filing responsibility implicit between payroll, bookkeeping and tax preparation.

Keep a copy of the completed response and evidence of its submission through the chosen supported route. Record the responsible person and follow-up task. Do not treat an internal provider-profile correction as proof that the IRS record has also changed. Those are separate systems, and the incident should explain the action taken in each.

Establish whether any other notices may have been sent to the unexpected address and arrange authorized retrieval where appropriate. If a specific tax matter is already open, track its response work separately. Correcting the mailing address does not answer the underlying notice or establish that its deadline changed.

Use postal forwarding as part of the practical mail plan where available, while completing the IRS notification process. The IRS warns that not all post offices forward government checks and advises taxpayers to notify it even after notifying the postal service. Avoid assuming that one forwarding request makes every tax-account record current.

Review any pending return prepared from the same company profile before it is submitted. Otherwise a stale address can be sent again after the correction effort begins. Coordinate the provider’s source configuration, the preparer’s return copy and the company’s approved address register, while preserving the actual history of what was previously filed.

Retain the CP148 notice, source filing comparison, decision on the correct address and any submitted correction together. Identify the evidence used to confirm the eventual record through an authorized channel. If processing or confirmation remains unresolved, keep the task open with an owner rather than labeling it complete solely because the form was mailed.

Document which system supplies the mailing address for future employment tax returns and who may approve changes to it. Keep a review step for material address changes and a dependable route for opening official mail. The finished record should explain why the notice arrived and how the company will receive and act on correspondence at its intended destination.