Register as Self-Employed:  Let the tax authorities know that you're working for yourself as a sales agent. You can usually do this online or by filling out a form.

Choose a Name: You can pick a name for your sales agency, but it should be unique and not already in use. This isn't a must, but it can make your agency look more professional.

Set Up a Bank Account: Open a separate bank account for your business earnings and expenses. It keeps things organized.

Sort Out Taxes: You'll need to pay tax on your earnings. Keep records of your income and expenses, and submit your tax returns to the tax authorities.

Get Proper Licenses: Depending on what you're selling and where, you might need licenses or permits. Check the rules in your area.

Insurance: It's a good idea to have insurance to protect yourself and your business. This can include liability insurance.

Find Clients: Start looking for companies that need your sales services. You can contact them directly or use sales platforms to connect with businesses looking for agents.

Build Your Reputation: Do good work, and word of mouth can help you find more clients. The better your reputation, the more business you'll get.

Manage Your Finances: Keep track of your income and expenses, and save money for things like taxes.

Plan for Growth: As your sales agency grows, you might consider hiring other agents to work with you. This can expand your business.