Hi Behrad,
Welcome to Community! QuickBooks Online is a dynamic program for all of your bookkeeping needs. It's important that you're on the right track with recording your expenses accurately, to ensure your keeping aligned with government guidelines. For this reason, I recommend speaking with an accounting professional for their expertise and best course of action. If you don't have an accountant, we can help you locate a ProAdvisor in your local area, by following this link.
If you have any other questions, feel free to reach out again. We'd be glad to help!