才发现父母有结婚纸, 没办结婚公证. 可以给他们在美国办公证吗?
-You may ask a friend of yours to translate it into English and your friend needs to go to a Notary Public (e.g. bank) to notarize his/her signature on the translation, and your friend also needs to write a statement addressing that he/she knows both English and Chinese very well, and the translattion is accurate. Then, provide the copy of the original 结婚纸(in Chinese), and the translation for I-130 filing for your father.
See these links for translation requirement:
https://www.uscis.gov/forms/forms-and-fees/general-tips-assembling-applications-mailing
http://www.immihelp.com/immigration/document-english-translation.html
我和联合担保人的税表都要3年的吗? 怎么有看到说是一年的就可以. 这有什么不同?
-One-year tax return is required, and three-year tax returns are optional.