CP12 letter - in error?

[jyeh74]

The IRS sent a notice decreasing my tax refund by $3165.  I was not sure what this was due to.  It says that tax owed was increased and I reviewed this with my 1040.  The difference between what I was supposed to get vs what the letter stated was $3165.  I looked online and it said that in situations where I changed employers in 2025, look at the W2 box 4 and add up all the numbers.  The former employer had $10,918.20 in box 4 and the new employer had the exact $3165.36 in box 4.  I am the only person listed on the W2.  Did the IRS get confused and think these were the same employer and reduced my refund by this $3165 amount?  Do I do amendment or do I call?  what number

[Bsch4477]

Call the number on your notice. 

[AnnetteB6]

To learn more about the letter you received, follow the advice of Bsch4477 and call the phone number on your letter.

However, the numbers you mentioned appear to be related to having multiple employers and reaching the maximum amount of Social Security tax withholdings for the year.  If your W-2s had different EIN numbers, then TurboTax would have likely included the excess amount of $3165 on your Form 1040 Schedule 3 line 11.  

You probably do not need to amend your return, but the IRS can advise you if that is necessary when you call.

See the following TurboTax help article to learn more about excess Social Security tax:

Can I get a refund for excess Social Security tax withheld?
 

@jyeh74