The name of your clothing line is everything. Choose a name that best represents you now and where you would like to go in the future with your clothing line. The next thing or even the first thing you should do at this exact moment is get your web site name for your clothing line. Web sites names are going super fast so get your today’s for as little as $10.
Register a domain namNext, do a search trademark search for your name. If it is available - register it with the United States Trademark Office (about $325).
Go to your city clerk office and register your business and then open a bank account in your business name.
Now you should be thinking about what type of clothes you want to make first. Do you want to start with T-shirts, jeans etc. Keep your scope limited at first until you build a name for yourself.
Buy a fashion design program like Digital Fashion Pro to lay out your fashion designs with (www.DigitalFashionPro.com - Demo Video). Get all of your fashion sketches together and figure out which ones you want to produce first. Show them to friends and family and see which ones people like the most. Next you can use your professional sketches to give to a seamstress, clothing manufacturer, or screen printer who can make your designs for you. (Read article on fashion design software and the fashion design process)
Next decide how you want to get your clothing made. Do you want to mass produce or just produce a few to see how things go. Producing locally or within the US. is your best bet for small production runs. Use the internet to find contractors or by contractors listing to help you.