You don’t have to go full Sherlock Holmes on this. If the process feels overwhelming, hire an accountant or use a tax refund service. Yes, they take a small cut, but sometimes paying for not pulling your hair out is worth every penny. Just make sure their website doesn’t look like it was built in 1998—that’s a red flag.
Many countries also have free tax help hotlines or local advice centers. They’re staffed by cheerful volunteers who actually enjoy talking about tax codes. Weird, but true.