If I made a withdrawal from 401k in 2020, due to the cares act for disaster relief, why am I still being charged the 10% penalty when it shouldnt be?

Because the new 8915-E form that you report that on does not even exist yet.

That is reported on a new 8915-E form that is not yet available and there is no estimated release date since the form is still in the draft state at the IRS. There is no telling how long it will take the IRS to make the electronic form available. Typical it takes the IRS 2-4 weeks to release the electronic form specifications after the paper version is released. e-file providers must program from the electronic specifications.

The draft paper form is here:

https://www.irs.gov/pub/irs-dft/f8915e--dft.pdf
https://www.irs.gov/pub/irs-dft/i8915e--dft.pdf

Also to see if you qualify for a COVID-19 related distribution see:
https://www.irs.gov/newsroom/coronavirus-related-relief-for-retirement-plans-and-iras-questions-and-answers