We can create a "test label" when using USPS, but that option is not available when using UPS.
We had an issue the other day editing an address on a UPS label, but the only way to verify it was to purchased it...then we had to cancel them...about three times! What a pain.
Turns out, for some stupid reason, you have to UNCHECK the "autocorrect" box in the edit window to get the corrected address to stay and print correctly on your label. SOOOO frustrating!