(810) 624-1368

Two things are certain.
We handle them both!™

Two things are certain. We handle them both!™Two things are certain. We handle them both!™Two things are certain. We handle them both!™

Two things are certain.
We handle them both!™

Two things are certain. We handle them both!™Two things are certain. We handle them both!™Two things are certain. We handle them both!™

(810) 624-1368

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Great Lakes Law Firm, PLLC

Great Lakes Law Firm, PLLC logo - Tax and Estate Planning Attorney in Grand Blanc, Michigan.

  • Based in Grand Blanc, Michigan, servicing nationally for federal tax matters and Genesee and northern Oakland Counties for all else. 
  • This practice focuses primarily on civil, federal tax issues before the I.R.S., the Independent Office of Appeals, and the U.S. Tax Court.
  • Additionally, this firm provides local legal counseling, business consulting, and estate planning—branded as Inevitability Planning—exclusively for Michigan residents.
  • Since opening this firm in 2018, Peter J. Mancini, Esq., the firm's founder, has been committed to providing honest, cost-effective guidance for the two certainties in life: navigating complex tax issues and securing your legacy through estate planning. 

Headshot of Peter J. Mancini, Esq., former  Senior Attorney & founder of Great Lakes Law Firm, PLLC.

Peter J. Mancini, Esq.

  • Former Senior Attorney at the Office of Chief Counsel for the I.R.S. and litigator in the U.S. Tax Court.
  • Practical strategist with experience in a tax-resolution and tax-strategy firm.
  • Experienced disclosure attorney with FBARs, foreign income, and foreign business ownership.
  • Business consultant with 20+ years in senior and executive management positions within banks and credit unions.

Contact me

Copyright © 2026 Great Lakes Law Firm, PLLC

A practice focused on Tax Law & Michigan Estate Planning in

Grand Blanc, Michigan, 48439.  Call (810) 624-1368.


Locally serving northern Oakland and Genesee Counties in Michigan and nationally for federal tax issues.


All Rights Reserved.


Please note that the information on this website is for general information purposes only. Nothing on this site should be taken as legal advice for any individual case or situation. No attorney-client relationship is created merely by viewing the information provided in this website.  An engagement agreement is needed for that. 

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