Awazon does not have a single permanent web address the way a clear-web shop does. It is a Tor hidden service, and it publishes several onion addresses that all resolve to the same market. There is no .com, and any clearnet page claiming to be Awazon is a phishing clone.
The three addresses below are the current pool, published by the market with a PGP signature. Copy one, open it in Tor Browser, and verify it against the login captcha before you enter anything. If one address is slow, the others resolve to the same account and balance, so switch freely.
The address you should treat as canonical is not any single one of these, it is the verified pool itself. Bookmark this page rather than a raw address, because the pool rotates over time and a bookmark to a retired address is exactly what a phishing operation waits to pick up. When an address changes, this page carries the current one.
Before every login, run the two-part check: verify the PGP-signed list once, and hold the address in your bar against the one the captcha prints every session. See getting a verified address.