Capital gains on long-term investments. Multi-state income over a year. And freelance work to supplement a shrinking salary. Every taxpayer has a unique income stream -- and a unique tax liability.

SmartMoney.com went to the streets to ask taxpayers about their biggest tax questions. Among those we heard about were how to sort out state and local taxes and simply how to maxmize your refurnd.

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Major changes for taxpayers for this year include a sales tax deduction on the purchase of a new vehicle purchased between Feb. 16 and Dec. 31, 2009. (Consumers can deduct state and local sales and excise taxes paid on up to $49,500 of the total purchase price.) Separately, homeowners can claim a deduction on property taxes, even if they re taking the standard deduction. Individual taxpayers can deduct up to $500, married couples filing jointly up to $1,000.

So what are your biggest tax questions? Join the discussion and upload a video to YouTube telling us the issue that concerns you most. You can also send us a video with your savviest tax move or the issue you find most confusing. Email the YouTube URL to mglassman@smartmoney.com.