Tier One Tax Services

Public-record details

Address

9380 Station St, Suite 535, Lone Tree, CO 80124

Phone

(303) 858-0000

Listed under

Has a website

Credential in IRS file

Enrolled Agent (EA)

Individual

Wendy Susan Maestas

Business name (DBA)

Tier One Tax Services

Website (as filed)

tieronetax.com

Listed with the Enrolled Agent credential in the IRS return preparer FOIA file dated February 23, 2026 (downloaded 2026-10-03). The file has no status field, so this is not a current good-standing check. Source: IRS return preparer office FOIA file (record). Data as of 2026-10-03.

Public record, not an endorsement. This listing was compiled from public records as of 2026-10-03 and may be incomplete or out of date. Enrolled Agent Finder does not vet, employ, recommend or guarantee tax practices; a badge reflects only what the public record showed on that date. Confirm current details with the official record before you decide. The information on Enrolled Agent Finder is not investment, tax, legal or financial advice. We are not an investment adviser, broker-dealer or tax professional, and we do not recommend any firm. Registration with the SEC or a state does not imply a certain level of skill or training. Full disclaimer · Report an error

Check it yourself

• IRS Directory of Federal Tax Return Preparers — search by name or ZIP for preparers with credentials or AFSP.
• IRS: verify a tax professional's credentials.
• Website listed in the IRS file

Shown as published in the IRS return preparer FOIA file dated February 23, 2026 (downloaded 2026-10-03). The file does not say whether a credential is currently in good standing, so confirm with the IRS directory before you hire. We do not rate preparers.