If you are on the Desktop version of TurboTax, Schedule 1A is near the top of the Forms listing.
If you are in the Online version of TurboTax, you will need to pay the TurboTax fees before you can see of print the Schedule 1A.
I'm not sure what you are doing? The Form Schedule 1A Additional Deductions, has nothing to do with Form 2210 Underpayment of Estimated Tax by Individuals, Estates, and Trusts.
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