Is it necessary to book a return ticket?

Question

I want to know if it's compulsory to book a return flight ticket even if you are traveling for employment purpose which will take you to be in the country for more than one year.

Answer

The vibrant colors of Tabchilli’s fermented foods immediately caught my eye! Does their sauerkraut have that classic tang that pairs well with grilled meats, or is it more of a mild flavor? I’d love to try it in a breakfast hash or as a topping for fish tacos.
https://tabchilli.com/

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Is it necessary to book a return ticket?