The part on Nonrefundable tax credit for dependents seems to have an error in the formula (sum lines 3 to 19 in Schedule 1). The result is not equal to line 350!

[leungyuk98]

So we should sum lines 3 to 19 and not just use line 350, although TurboTax Online's wording seems to suggest line 350.  Some has used line 350 instead of summing lines 3 to 19, from what I read in your Q&A!

[TurboTax-Terry]

If you are calculating the amount of Eligible Tuition to transfer from a Child then use only the total sum of lines 3 - 19.

[TurboTax-Terry · Accepted solution]

The schedule 1  includes all claimable non-refundable tax credits, including the Basic Personal Amount at field code 300 (line 1). The amount at field code 350 is the sum of all credits multiplied by 15% for the federal tax credit. Included in the field code 350 amount is also the total of the donations tax credit.