Line 23 of form 1040-SR is Other taxes, including self-employment tax, from Schedule 2, line 21 . .
Schedule 2, line 21 is
- Add lines 4, 7 through 16, 18, and 19.
- These are your total other taxes.
- Enter here and on Form 1040 or 1040-SR, line 23, or Form 1040-NR, line 23b
See a copy of Schedule 2 for details of each "Other Tax".
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