A friend is coming from the uk to the us and said that the uk now has a PTA personal traveling allowance and she must show funds before allowed to board plane and they give funds back to her is this true

It is a scam, there is no BTA needed to travel for. UK to USA. Do not give them money. Ask yourself, why would they give it back?

A friend?

Your friend is trying to scam you out of money.

Not true...