If I want to gift (tax free $15000) to a child for 2021, can I just contribute that to their bank account? Does it qualify as a gift?

[xmasbaby0]

Yes that would be a gift to your child, whether you deposit it to the child's bank account, write a check to the child,  or put the cash the child's hand.

GIFTS

Money that you receive as a gift is not taxable income to you, and you do not need to report it on your income tax return.  Money that you gave as a gift to someone else is not deductible for your taxes.

Turbo Tax does not support the gift tax form 709, but here is a link:

https://www.irs.gov/pub/irs-pdf/f709.pdf

https://turbotax.intuit.com/tax-tips/estates/the-gift-tax-made-simple/L5tGWVC8N

https://www.forbes.com/sites/ashleaebeling/2017/10/19/irs-announces-2018-estate-and-gift-tax-limits-...

[TomD8]

It qualifies as a gift if you get nothing in return and you don't expect repayment.

All gifts are tax-free to the recipient.