Since the release of Shadowlands, credits are very common, so long as you know where to go. The best place to make money now is Elysium. If your level 100 or higher, you can level there in a team and get ingots, which sell for a large amount, platinum being the best, selling for 3-5 million credits depending on the QL.

At level 180+ you can usually solo these for credits with a good character, but they still hit hard so be careful. Make sure to ask a trader to sell anything that will make a good amount of money, as they receive about 255% of what you can receive, and slightly more with higher levels, as its based upon Computer Literacy.

You can also purchase credits online at the only trusted place, MySuperSales. Pick your server below to buy credits online: