Filing taxes for an unregistered company can seem daunting, but it's really just a matter of following the right steps. First, you need to determine your business structure as it will dictate which tax forms you'll need to fill out. Then, you'll need to gather all financial records, including income, expenses, and potential deductions. After that, you can either file your taxes manually or use tax software. Remember, it's crucial to file before the deadline to avoid penalties.