Can I apply for US citizenship as a green card holder from my native country (Germany)?

You cannot. Check the citizenship requirements on uscis.gov

Is it ok if I travel to Puerto Rico even though my passport and permanent residency card expired?

You need a valid government issued I'd. If your license is real id..you can use your license.

A green card holder is not considered a foreign partner. You should consult with a CPA/ Tax lawyer to address your concerns any tax implications.

If I travel without AP and come back with my F1 status, is my TPS and EAD both be still valid?

Is never a good idea to travel without permission. At least should speak with an attorney about getting AP application filed and approved.

How to invite my mother in law to get a visa to help my husband and 3 kids, because leaving for Basic Combat Training?

You should consult with an attorney as my colleagues have mentioned to go over any options you have.

Approval of I765 and i have just done finger print?

Submit the application to change your address. Checkin with your old address to see if it was received. Check online with the receipt to see if...

Do I need anything in writing from the court in Canada indicating the counsel program is not guilty plea or admission?

You need to get the complete court record. If is in another language, you need to have translated. In the court record, there should be a...

Can an employer with hold your W-2 for any reason?

This is not an immigration question. You should consult an employment attorney.

Naturalization process

You should submit a change of address when you move. However, it depends where you moving to. If you are moving across the country or within the...

What happens after the approval notification of the I-797?

The facts are not enough to provide an answer. However, you should consult with an attorney to make sure the case still active. If an I-130 was...