Reason Codes
Non TPP Issues
DUPFS
IP PINS
Superseding Returns
100

What is the maximum number of reason codes that can be used in an adjustment?

3

100

The taxpayer calls to update their address but there is an unresolved TPP issue on the account. Should the address be updated?

No

100

When does a true duplicate condition occur?

When a taxpayer files two returns with the exact same tax information. 

100

What pin is used when the taxpayer has to file a tax return after they experienced identity theft issues?

IP PIN

100
When is a return considered a superseding return? 

When an amended (Form 1040-X) or corrected (duplicate) return is filed on or before the due date or the extended due date.

200

A reason code with one asterisk is for what type of accounts?

International accounts

200

Taxpayer calls to request account information but account shows an unresolved TPP issue. What account information can be provided to the taxpayer?

No account information until the TPP issue has been resolved.

200

How are true duplicate returns identified? 

 By TC 971 AC 142

200

What letter will show on IMFOLE if a taxpayer’s IP PIN was issued?

CP 01A

200

When making an adjustment on a DUPF or XRET case, what blocking series do you use? 

BS 05

300

What reason code would you use for Qualifying Surviving Spouse (QSS)

005

300

When receiving a call and the tp has unresolved tpp issue and not other issues what type of disclosure should be done?

Basic disclosure

300

If the second return received is a true duplicate return, how do you process/work the claim? 

Release the "–A" freeze by inputting a TC 290 .00. No Reason Code and no amended claims date is required.

300

How long should a taxpayer allow for a IP PIN letter to be issued?

21 calendar days

300

When do you manually assess an estimated tax penalty (TC 170.00) on a superseding return? 

The TC 170 is necessary on a superseding return whenever a manual or self‑assessed estimated‑tax penalty must be posted or increased because the superseding return changes the tax basis for the penalty.

400

What should the reason code selected describe?

The area(s) of the return affected by the adjustment action.

400

Taxpayer calls after verifying their identity online and wants to check on the status of their refund. What would be an appropriate response?

Allow the full 9 week timeframe

400
When a duplicate filing occurs, what freeze code does the master file generate? 

-A Freeze

400

What screen will show you “IP PIN: 1” to indicate the tp is enrolled in the IP PIN program?

IMFOLE

400

When is the Item Reference Number (IRN) 871 necessary for a superseding return? 

IRN 871 is necessary for a superseding return whenever the tax‑shown field on the taxpayer’s account needs to be corrected or updated.

500

When is a reason code not required?

A ripple effect change and When specific instructions in the IRM direct you not to

500

If a taxpayer received a 4883C letter and claims to have verified their identity, How would you verify this information?

AMS narrative

500

When the Files Function no longer pulls returns for duplicate filing conditions, what command code do you use to request the return? 

CC ESTAB

500

What type of authentication should be done if a tp is calling to request an IP PIN be rei-issued?

Basic and additional authentication (High Risk) Disclosure

500

How is a 6020(b)return identified on TXMODA?

 By computer condition code (CCC) 4 and the literal "6020B" at the end of the TC 150 assessment DLN.

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