First tax season as a freelancer blindsided me here's what I changed so year two was different
Year one was rough. I owed way more than expected (self-employment tax on top of income tax nobody told me to set aside 25–30%), and I couldn't claim most of what I'd spent because I had zero documentation. What I fixed before year two:
Set up quarterly estimated payments immediately. Underpayment penalty is avoidable and feels terrible
Opened a dedicated business account so expenses were automatically separated
Started tracking mileage with Everlance. I'd driven to client sites all year and had nothing to show for it mileage needs contemporaneous logs, you can't reconstruct them. Made a habit of forwarding receipts to a folder same-day. The documentation piece was the biggest shift. Deductions you can't prove don't count.