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I've set up a dummy domain (Not SEO'd I know) in order to get some input on if I'm doing this correctly. Here's my option on the set up and https://technicalseo.com/seo-tools/hreflang/ is saying it's all good. I'm self-referencing, there's a canonical, and there is return tags. https://topskiphire.com - US & International English Speaking Version https://topskiphire.com/au/ - English language in Australia The Australian version is on a subdirectory. We want it this way so we get full value of our domain and so we can expand into other countries eventually e.g. UK. Q1. Should I be self-referencing or should I have only a canonical for US site? Q2. Should I be using x-default if we're only in the English language? Q3. We previously failed when we had errors come back saying 'return tags not found' on a separate site even though the tags were on both sites. Was this because our previous site was only new and Google didn't rank it as often as our main domain.