For most countries, you can find this information on their government website. If you do need a visa, these websites will also explain the application process.
Will some countries, for example, the Dominican Republic, you apply for your visa when you land in country.
For some countries, it may still be a manual process. For example, you may have to book an appointment with that country’s embassy or consulate.
There are many companies that help you apply for visas. Unless you do this regularly, you may want to use one of these services. Our partner is MSI.