If I disobeyed my parents command (a breach of the commandments) to lie for them (another breach) what should I do?
The commandment says to
honor your father and mother, which is not always the same as to
obey them.
I don't think it is at all truly respecting or honoring of a person to unconditionally do whatever that person says to do, even something wrong or harmful, whether that person is one's parent or parents or anybody else.
That being said, however, I want to say that I think that this particular commandment, the commandment to "honor your father and mother", is an example of something in the Bible (and which has unfortunately come to lie in the center of Judeo-Christian and Western traditional morality) which is really wrong.
The Bible was written by fallible human beings, and I consider it to exhibit human fallibility and human prejudice just like anything else that has ever been written. And I think the commandment to "honor" your father and mother", which in the biblical text is unconditional, and does not make any exceptions if one's parents are abusive or otherwise not deserving of honor, is wrong.
In particular I think it is very wrong to say to anybody who has or has had an abusive parent or parents that such a person has any duty or obligation to honor such parents.
If anything there should be a commandment to parents which says for them to treat their children with dignity and respect, so that they (the children) might come to treat themselves and others with dignity and respect.
I find it interesting to note that the recently deceased Swiss writer and psychotherapist
http://en.wikipedia.org/wiki/Alice_Miller_%28psychologist%29">Alice Miller, particularly in her book
http://www.alice-miller.com/books_en.php?page=11">The Body Never Lies, does what I consider to be a very good job in refuting the promise that comes with the commandment ("that your days may be long in the land which the Lord your God gives you"), and the implied threat that one's days will not be long if one does not honor one's parents. The first part of her book deals with a number of well known writers and artists who were very perceptive of the ills and evils of the society in which they lived, but who never considered challenging or breaking the commandment to always "honor your father and mother", and never assigned any blame or culpability to their parents, no matter how cruel or abusive they might have been. The writers and artists whom she deals with all died at a relatively young age, usually due to either sickness or suicide.
My own father was a very difficult person, and my being a Christian turned out to be not at all of help to me in enabling me to deal with him those times when he was difficult or obnoxious the way I wish I had been able to while he was alive. This was the biggest single factor which led me to become disenchanted with Christianity in general (as distinct from fundamentalist Christianity in particular, which I had problems with even while I was still a Christian), and to eventually part company with the faith.
And I don't think it was simply unfortunate that Christianity was not helpful. There is the commandment to unconditionally "honor your father and mother", and there is a passage in Hebrews 12 which says to gladly accept the chastening ot the Lord, like that of a "good" father -- like my father.