Read the account as a timeline, not a list of codes

A return posted to the tax module. The amount may show tax assessed with the return.

An additional assessment or adjustment posted. A zero amount can still reflect an account action.

A prior assessment was reduced.

Additional tax was assessed following an examination action.

A previously posted examination assessment was reduced.

The module reflects an examination indicator. It does not by itself explain scope or outcome.

The examination indicator was generally reversed or closed.

A return or module was identified for possible examination activity.

The account reflects a pending Offer in Compromise indicator.

The pending-offer indicator was reversed.

The account reflects rejection of an Offer in Compromise.

A litigation-related freeze posted; the closing code is necessary to interpret the reason.

A prior TC 520 freeze was reversed.

The IRS reported the account as currently not collectible for a specified closing reason.

A federal tax lien indicator posted to the module.

The module reflects a balance removal associated with expiration of the collection period.

A payment submitted with a return posted to the account.

An advance payment posted before a final assessment or account action.

An estimated tax payment posted for the tax period.

A payment posted after the return or assessment.

A credit was transferred from another tax module.

A refund or credit was applied to another federal tax debt.

A refund was scheduled or issued.

An account action posted. The action code and surrounding entries are essential to interpretation.

A prior TC 971 action was reversed.