The Oregon Department of Revenue and the Oregon Film and Video Office may have just what you need. Revenue and Oregon Film will be offering tax credit certificates worth $500 at auction where taxpayers can get them at a discount. A total of 42,400 income tax credit certificates worth $500 each will be auctioned off August 10-14. When tax time comes, each certificate is worth $500 toward a taxpayer’s tax bill even though the taxpayer potentially paid less than that for the certificate. Taxpayers can bid as little as $450 per tax credit certificate, possibly saving up to $50 on their tax bill for every credit purchased.