Hi Barbara,
Assuming you're talking about the complete charging port assembly - the same one that's advertised here on iFixit - then no, you do not need to do any soldering to replace it.
[image|2999124]
After going through the Daughterboard Replacement guide, here are the tools you need.
* Heat source: heating pad / iOpener / heat gun / blow dryer
* Opening pick(s) / plastic card
* Suction cup
* Phillips #000 screwdriver
* Spudger
[guide|122601|Samsung Galaxy Tab S3 Daughterboard Replacement - iFixit Repair Guide|new_window=true]
It appears that iFixit is out of stock on those daughterboards, but you shouldn't have any trouble finding a replacement on places like Amazon, eBay or AliExpress. Here's an example.
[link|https://www.ebay.com/itm/374060883007|Charging Port Board For Samsung Galaxy Tab S3 9.7 SM-T820 / T823 / T825 / T827|new_window=true]