I have just had a home inspection on my home. The inspector said that I had several double taps. Can these be corrected without adding breakers. The 200 amp panel is almost full.

There are three ways that the problem can be corrected:
1) Add a subpanel
2) Replace single breakers with tandem breakers
3) Pigtail the connections

1) The subpanel requires a large circuit breaker in the main panel. In the sub-panel ground and neutral are isolated. You usually have to purchase a ground bar kit and it will not have a main breaker.

2) A tandem breaker has two independent circuit breakers in a single slot. There is a label on the panel which specifies the number of "poles" the panel can have. This cannot be exceeded. A "pole" might be defined as the number of places to connect circuits.

3) Circuits can be pigtailed. A short length of wire connected to the two circuits wirenutted together.

Exactly what I needed

Before adding too many tandem breakers, read the fine print on your box label about how many poles you are allowed.