You should file a Schedule C. You do not need to have a business license to file a Schedule C. If your husband has made income that has been reported to him on a Form 1099-MISC and this income is in his typical line of work, this income will be subject to Self Employment Taxes (15.3%) in addition to being taxed at your Federal Tax Rate.
If you deduct the expenses related to this income via a Schedule C, every dollar you add of expense will be one less dollar of income that is subject to the Self Employment Tax and the Federal Income Tax.
For more information on the Schedule C:
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