I pay for my son's transportation after school since I am working, can I use that payment as a tax deduction?

[CherylW]

If you're only paying for transportation, then no, you can't.

This, from the Instructions for Form 2441 from the IRS:

If you paid someone to care for your child or other qualifying person so you (and your spouse if filing jointly) could work or look for work in 2018, you may be able to take the credit for child and dependent care expenses.