Can I manually enter amounts on Schedule 4 and on Line 1040 using Forms?

[Hockey22]

When I attempt to check Box 62c on Schedule 4, and increase the amount of additional tax, the form will not allow manual entry.  Additionally, when I click "Edit" on TT, While is shows an "override" option, that option is not active.

[MichaelL1]

Have you tried to enter the code and then the amount?

Box 12 codes are:

    A -- Uncollected Social Security or RRTA tax on tips
    B -- Uncollected Medicare tax on tips
    M -- Uncollected Social Security or RRTA tax on taxable cost of group-term life insurance over $50,000 (former employees only)
    N -- Uncollected Medicare tax on taxable cost of group-term life insurance over $50,000 (former employees only)

[Hockey22]

Thanks for the input.  The W2 Box 12 Code is "Z".  Schedule 4 will not permit me to either check or insert "Z" in Box 62c, and will not permit me to enter an additional amount on Line 62.

[MichaelL1]

Thank you and this is what I found and posted in answer below.

[MichaelL1]

https://ttlc.intuit.com/replies/6738095