You can apply for a US B-1 visa or an L-1 visa to get a US business visa as a self-employed individual. You can follow the steps given below to get a Business visa in the US if you are self-employed:
Step 1: Decide on the visa type that better aligns with your goals (B-1 visa or L-1 visa)
Step 2: Once you have finalized the visa, you can go ahead and fill out the DS-160 Form
Step 3: Gather the required documents and submit the US business visa application
Step 4: Schedule a visa appointment at the local US embassy
Step 5: Attend the visa interview along with the required documents and await the visa status