My question is do we need to file a 601 waiver and what is the cost for preparing and filing the K1 and 601 waiver?

A waiver is likely. You should contact a qualified attorney.

Two facts not covered by the first two answers. Know that the I-134 is not worth the paper it is written on as far as being a binding contract....

Immigration - birth certificate

Look up Iran under the department of state's reciprocity schedule.

Where can I use my alien number ?

I agree that when you receive your alien registration card, the law "requires" that you carry it at all times.

I'm 21 and a citizen what can i do to fix her paper without her leaving the country?

Your Mother likely has some options to pursue, so she (and you) should definitely have a proper consultation with an immigration attorney.

How would this impact my eligibility to apply for citizenship?

How about fair arrests? Any of those?

When we get married. Should we start the process from the US marriage visa?

You should have a proper consultation with an immigration attorney. You don't mention where you currently live. If what you want is easy access to...

Should follow my process through the consulate in Qatar or I can do it in Germany. ?

If you request processing through the U.S. Consulate in Frankfurt, they will likely accept the case, however you really don't give much in the way...

If the marriage is valid in Sweden, more than likely valid here. You can visit without a greencard (you won't have one simply by marrying her in...

When should I hire a lawyer to file the k1? Can I do it with a pending misdemeanor?

Some convictions must be disclosed on the I-129f form. Some convictions require a waiver. Some convictions might be disclosed to your fiancee. I'm...