As a self-employed person, you can expense work-related training and education if it is needed to maintain or improve your qualifications for your present job or career, but you can't expense training needed to change careers or meet the minimum requirements for your career.
If the training is provided at an eligible institution that issues you a 1098-T, you may also be eligible to use the expense to qualify for the Lifetime Learning credit. You can't use the same expense for two different deductions or credits. The credit may be more lucrative since it is a direct tax credit rather than a deduction, but you would have to test that for yourself.
