Tax credits while running a Ltd company

I'm about to launch a business as a Ltd company however I am currently a part time working single mom. I claim tax credits child/working tax alongside my monthly salary. I'm planning to leave the funds from the Ltd company in until the business builds to the point I can financially cope without depending on tax credits. Am I right that I don't need to notify tax credits? As sole traders and Ltd are different in the sense that it's only classed as a salary if I pay myself from the Ltd company. Please help thanks