Small Business Relief and Job Creation Act This bill amends the Internal Revenue Code to allow small business employers whose gross receipts in the preceding taxable year did not exceed $20 million or who did not employ more than 100 full-time employees during the preceding taxable year a work opportunity tax credit for hiring unemployed individuals as full-time employees (at least 30 hours per week for 35 or more calendar weeks in the taxable year) during 2018 or 2019. The bill doubles the rate of such credit for employers located in counties with unemployment rates that exceed the national rate of unemployment.