I'm trying TurboTax because H&R Block Online also did this incorrectly and put my dependent's medical expenses on Line 330 instead of Line 331.
Line 330 should be for my and my spouse's medical expenses, which won't give any refund if it's less than 3% of my net income.
But for dependents, it only has to be more than 3% of the DEPENDENT'S net income as shown in the link below. Since all my children's income are $0 all of their medical expenses should count regardless of how much they are.
https://www.canada.ca/en/revenue-agency/services/tax/individuals/topics/about-your-tax-return/tax-return/completing-a-tax-return/deductions-credits-expenses/lines-330-331-eligible-medical-expenses-you-claim-on-your-tax-return.html
Line 331
Step 2
Find out which amount is less between:
3% of your dependant's net income (line 236)
or
$2,302