In this form you are the principle and the person you give authority to is called the agent. Form 548 power of attorney com rad 548 08 18 taxpayer s ssn or fein taxpayer s name retention revocation of prior power s of attorney by filing this power of attorney form you automatically revoke all earlier power s of attorney on file with the comptroller of maryland for the same tax matters and years or periods covered by this document. Find your maryland md power of attorney form by type below.