Below is a FAQ microdata schema code template you can copy and paste and add to your page HTML. You would repeat the .faq-question div block for each QA answer set. Once you are done adding your markup you can test it in the Google schema tester.
If you are using WordPress, I noticed the rich text editor strips out the important microdata code. I found this plugin that prevents this and makes it work as it should.
<div class="schema-faq-code" itemscope="" itemtype="https://schema.org/FAQPage"> <h4>Frequently asked questions</h4> <hr /> <!-- repeat question blocks as needed --> <div itemscope="" itemprop="mainEntity" itemtype="https://schema.org/Question" class="faq-question"> <h3 itemprop="name" itemprop="name" class="faq-q">Question text</h3> <div itemscope="" itemprop="acceptedAnswer" itemtype="https://schema.org/Answer"> <p itemprop="text" itemprop="text" class="faq-a">Answer text</p> </div> </div> <!-- /.faq-question --> </div>