Can i mail the estimated paymet togheater with the retunn

I think there may be a bit of confusion here!

When you're talking about a "return" and an "estimated payment", I'm assuming you're referring to a situation where you've purchased something online and need to return it to the seller.

In this case, you can't mail an "estimated payment" to the seller. Instead, you would typically need to contact the seller and arrange for a return shipping label or instructions on how to return the item.

If you're referring to a different situation, please provide more context or clarify what you mean by "estimated payment" and "return", and I'll do my best to help!