To enter federal or state withholding amounts when there is not an applicable section in the Q&A interview, use Form 1099-MISC for Box 3. This will transfer the federal/state withholding to the appropriate lines of the returns. The actual Form 1099-MISC is not electronically filed with the return; only the information that it contains is electronically filed. As instructed below, only the withholding entries are completed for the form, and no amount would actually be entered for Box 3.
Some examples of forms where this may be necessary are Forms 1099-PATR, Forms 1099-K, and Forms 1099-G for Taxable Grants and lottery winnings not reported on Form W-2G.
Note that if you have multiple amounts to enter you would combine them into one entry (one entry for the federal withheld amounts and one for the state withheld amounts).