I have hypothyroidism and need to know how much that affects my lipids?

Yes. If your hypothyroidism is not well controlled your triglycerides might be very difficult to control and potentially high.
Multiple Effects. Hypothyroidism is one of the most common conditions to affect lipoprotein metabolism. Beyond contributing to elevated cholesterol and triglyceride levels, hypothyroidism commonly increases LDL particle number. Treating hypothyroidism is key to lipoprotein control. Most physicians attempt to maintain TSH levels less than 2.0 as a goal of therapy.