I work full time and in February 2017 I started doing some e-commerce selling on Amazon. Started out slow but as I learned what brought huge ROI, I started to focus in on those particular items. Fast forward to today I have just over $35k in sales in 7 months. Nothing super substantial, but I can scale it up big time and would expect closer to $80k-ish next year. Problem is, I really didn't expect things to go this well. I haven't been keeping the best records. I have a handful of receipts/invoices for the products I've been selling and a some handwritten receipts. I am becoming concerned now re: income taxes. Also, now that I have reached the $35k in sales, I apparently must register my account to start collecting GST/HST. I imagine that I should also register a business name and a sole proprietorship license or whatever? And then at what point can I start writing off business expenses? I have not kept physical receipts for things like fuel, but would be able to obviously provide paperwork for things like utilities, etc. I also wonder how CRA will compute my NET income for this. My sales are $35k but of course that is not my "take-home". There is my cost for the product, (which is a fair amount in handwritten receipts in a receipt book --- is this good enough?), there is the fees I am charged, etc etc. Should I talk to an accountant? bookkeeper? Recommendations for a small business accountant? I can keep better records going forward, but I never expected it to become quite so profitable until now it's too late and I don't have great records.