Up here, all you have to do is go through the return procedure on Amazon, they send you a page to print, you wrap up the blouses and tape the printed page onto the package and take it to the post office. The post office takes it at no charge. As soon as the post office processes the package you get your refund into your charge card - you don’t even have to wait for Amazon to get the package back.
Maybe someone can confirm if it works the same for your area.
Here I go to Amazon return page. They ask a few questions and give you a bar code. Take a picture of the bar code. Put the item back in the original package it came in. Don’t seal it up and no label needed. Take it to your closest UPS store with the bar code on your camera. They do the rest free of charge.
I have never known of being able to take it to a store.