RE: Free trial Dynamics Business Central
In regard to the creation of an Office 365 trial, Microsoft changed their policies recently and it looks like you have to enter credit-card information during the process.
At the last step you are indeed asked to enter credit card information. However, if you stop the wizard (close) at that moment, without entering any credit card info, the Office 365 trial is created any you can use it.
Make sure you write down the email/password, before you close the browser.