You had plenty of time to file your 2018 return. At any time between the April 2019 filing deadline and April 17, 2022 you could have mailed that 2018 return from anywhere in the world, and it would have been timely in order for you to receive your refund. If you did not file it by the deadline in 2022, then you forfeited the refund.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
