I just mailed my fed tax return via UPS here in frankfort, ky. I indicated that I should send it to:

Internal revenue service
Austin, tx 73301-0002

But they told me that they are sending the returns the address below so I just trusted them since they are one of the designated mail services. Is this going to be a problem for my return? Thanks.

3651 s I h 35
Austin, tx 78741-7855