Where do I find my amount for roth IRA contributions on my W2

[SusanY1]

If you elected to defer income into a Roth plan with your employer, the amount will show in Box 12 depending on the type of plan the code can be AA, BB or EE.

[dmertz]

However, this Roth account is not a Roth IRA.  Enter amounts shown in box 12 of your W-2 only in box 12 of TurboTax's W-2 form, nowhere else in TurboTax.

[AmyC]

Since you said Roth account and not on W2, believe this is a SEP. If so, follow these steps, Where do I enter my SEP IRA contributions?

Related links:

Designated Roth Accounts - Internal Revenue Service.  

Ten Differences between a Roth IRA and a Designated Roth Account. 

@dmertz

[dmertz]

SEP contributions cannot be Roth contributions.

It's extremely common for people to think that a Roth account in an employer plan is a Roth IRA, but it can't be.  A designated Roth account in an employer-provided retirement plan is a different kind of Roth account.

Roth contributions to an employer-provided retirement plan are reported with code AA, BB or EE in box 12 of the W-2 and are to be entered only in box 12 of TurboTax's W-2 form.

Employers can provide for deposit of part of your pay into a Roth IRA, but this is simply a convenience for you to make regular personal contributions to a Roth IRA and is not an employer-provided retirement plan.  It's unlikely that the amount of personal contributions would appear anywhere on your W-2, but if it did, it would only be for your own information, perhaps in box 14.