Familiarise yourself with the local tax regulations. You should be able to expense most things related to your work (home office, office supplies, internet etc).
Learn basic accounting, and do it yourself using an online package like WaveAccounting or Xero.
In Canada, freelancers often pay less tax than their full-time counterparts.
All independent and freelance workers are required to pay 1040-ES every quarter and could/might/will face penalties if they don't make payments in a timely manner or underpay. Estimated payments are a way to balance out the taxes you owe to the government.
Learn basic accounting, and do it yourself using an online package like WaveAccounting or Xero.
In Canada, freelancers often pay less tax than their full-time counterparts.