RefWork's in-text citation tool is called RefWorks Citation Manager, or RCM. To use RCM, you must first install an extension onto your computer. To do that, log into RefWorks and select Tools, then Tools. Look for "RefWorks writing tools." There will be options for installing RCM; click the link that is most appropriate for your workspace (ie Word or Google Docs). Follow the links to install the add-on.
Once the add-on is installed, it is easy to find. In Word, it will be in the toolbar (always; not just when you are using it). In Google Docs, it will be under Extensions. To start using RCM, click that link. A box will appear on the right side of your screen for RCM. Log in to RefWorks and you are ready to start adding citations!
Use RefWorks Citation Manager if you are using Word 2016 or later. The above tutorial walks you through installation and using it.
If you're using Google Docs, the above tutorial will guide you through installing and using the RefWorks add-on.