Reason Code
TC 971s
CIS General Guidelines
CRNs
TCs
100

RC 018

What is Schedule E ?

100

AC used for TC 150 posted to another tin/tax period

What is AC 001?

100

The screen column A of the 1040x sho match with

What is TXMODA?

100

CRN 888

What is Adjusted Gross Income?

100

TC 291

What is Decrease in tax?

200

Reason code for business income or loss.

What is RC 012?

200

Ac 010

What is amended return forwarded to adjustment?

200

The IRM chapter used to research IMF Adjustments

What is Chapter 21?

200

CRN 336

What is Additional Child Tax Credit?

200

Decrease in tax

What is TC 291?

300

Reason code needed if TP 1040x is sent in for 401k

What is RC 016?

300

AC Present on account if it’s been forwarded to Statue

What is 014?

300

Letters use for  complete disallowance 

What is 105c letter ?

300

CRN 806

What is increase in Withholding?

300

Results in G- freeze

What is TC 270/271?

400

RC 049

What is Total Tax?

400

TP enters New installment agreement

What is AC 063?

400

task you should do before transmitting 105/106c letter

What is print and attach to case?

400

CRN 884

What is Alcohol Fuel Tax?

400

TC for fFailure to File penalty

What is TC 170/171?

500

reason code use for 290 for .00 if RC is required for adjustment.

What is RC 099?

500

AC 262

What is Maximum Failure to pay penalty assessed?

500

10 digit alphanumeric code 

What is CIS Case ID?

500

Reference number used for Unreported Tip Income

What is 891/892?

500

Results in a L-freeze

What is TC 770/771?

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